creephole
bolthole
ha-ha
muse
out
bolt-hole
draw out
exfiltrate
burrow
smeuse
drive
earth
kennel
cwtch
march out
leak
debouch
hatch
deviate
burrower
avenue
scare off
intrudable
cave in
spider hole
give someone the slip
Houdini
getaway
gap
trip
draw away
mouthline
evade
slippage
slip
latibulum
protrude
chamber
sink
subside
den
tunnel
ride off into the sunset
break away
break
skulk
break out
go underground
escapement
go to ground
dead ground
vista
nosing
encave
gee
go south
squeak
close call
venthole
crib
outskip
retire
visitation
narrow escape
burst out
close shave
infiltrate
brisure
bust
squeaker
go-by
exfiltration
trip up
resurface
everfleeing
stymie
vent
strayer
get to grass
intrant
profound
grotto
pit
liftoff
pitfall
break sheer
reeve
hit the dirt
poke out
sprout
get away with
strike
aperture
hit the deck
intrudable
everfleeing
intrant
profound
out
creephole
bolthole
ha-ha
muse
bolt-hole
burrow
smeuse
cwtch
kennel
burrower
avenue
cave in
spider hole
getaway
mouthline
slippage
latibulum
chamber
den
tunnel
escapement
dead ground
vista
nosing
squeak
close call
venthole
visitation
narrow escape
close shave
brisure
squeaker
go-by
earth
exfiltration
stymie
vent
strayer
grotto
pit
liftoff
pitfall
aperture
draw out
exfiltrate
drive
earth
kennel
march out
leak
debouch
hatch
deviate
scare off
give someone the slip
Houdini
gap
trip
draw away
evade
slip
protrude
sink
subside
ride off into the sunset
break away
break
skulk
break out
go underground
go to ground
encave
gee
go south
crib
outskip
retire
burst out
infiltrate
bust
trip up
resurface
get to grass
break sheer
reeve
hit the dirt
poke out
sprout
get away with
strike
hit the deck
adv
- moving or appearing to move away from a place, especially one that is enclosed or hidden
- away from home
- from one's possession
adj
- being out or having grown cold
- not worth considering as a possibility
- out of power; especially having been unsuccessful in an election
- excluded from use or mention
- directed outward or serving to direct something outward
- no longer fashionable
- outside or external
- outer or outlying
- knocked unconscious by a heavy blow
adj
noun
verb
verb
- To use means to entice or force (an animal) from its hole or similar hiding place.
- To improve a losing hand to a winning hand by receiving additional cards.
- To physically extract, as blood from a vein.
- To extract, bring out, as concealed information; elicit; educe.
- To cause (a shy person) to be more open or talkative.
- To make something last for more time than is necessary; prolong; extend.
verb
- (hunting) chase from cover into more open ground
- operate or control a vehicle
- travel or be transported in a vehicle
- cause someone or something to move by driving
- force into or from an action or state, either physically or metaphorically
- to compel or force or urge relentlessly or exert coercive pressure on, or motivate strongly
- cause to move back by force or influence
- compel somebody to do something, often against his own will or judgment
- push, propel, or press with force
- cause to move rapidly by striking or throwing with force
- strive and make an effort to reach a goal
- move into a desired direction of discourse
- have certain properties when driven
- work as a driver
- move by being propelled by a force
- urge forward
- proceed along in a vehicle
- strike with a driver, as in teeing off
- hit very hard, as by swinging a bat horizontally
- excavate horizontally
- cause to function by supplying the force or power for or by controlling
- (hunting) search for game
noun
- the act of applying force to propel something
- a mechanism by which force or power is transmitted in a machine
- a series of actions advancing a principle or tending toward a particular end
- a road leading up to a private house
- the trait of being highly motivated
- hitting a golf ball off of a tee with a driver
- the act of driving a herd of animals overland
- a journey in a vehicle (usually an automobile)
- a physiological state corresponding to a strong need or desire
- (computer science) a device that writes data onto or reads data from a storage medium
- a wide scenic road planted with trees
- (sports) a hard straight return (as in tennis or squash)
verb
- To hide, or cause to hide, in the earth; to chase into a burrow or den.
- To bury.
- To burrow.
- To connect electrically to the earth.
noun
- The lair or den (as a hole in the ground) of an animal such as a fox.
- The people on the globe.
- A region of the planet; a land or country.
- Any planet similar to the Earth (our earth): an exoplanet viewed as another earth, or a potential one.
- A connection electrically to the earth ((US) ground); on equipment: a terminal connected in that manner.
- The ground, land (as opposed to the sky or sea).
- Soil.
- The world of our current life (as opposed to heaven or an afterlife).
- The aforementioned soil- or rock-based material, considered one of the four or five classical elements.
- Worldly things, as against spiritual ones.
- Any general rock-based material.
verb
- To break open when a young animal emerges from it.
- To shade an area of (a drawing, diagram, etc.) with fine parallel lines, or with lines which cross each other (cross-hatch).
- To devise.
- To emerge from an egg.
- To close with a hatch or hatches.
- To incubate eggs; to cause to hatch.
noun
- A group of birds that emerged from eggs at a specified time.
- A trapdoor.
- An opening into, or in search of, a mine.
- The act of hatching.
- A gullet.
- A birth, the birth records (in the newspaper).
- A floodgate; a sluice gate.
- An opening through the deck of a ship or submarine
- A horizontal door in a floor or ceiling.
- Development; disclosure; discovery.
- A bedstead.
- A small door in large mechanical structures and vehicles such as aircraft and spacecraft often provided for access for maintenance.
- A frame or weir in a river, for catching fish.
- An opening in a wall at window height for the purpose of serving food or other items. A pass through.
- The phenomenon, lasting 1–2 days, of large clouds of mayflies appearing in one location to mate, having reached maturity.
noun
- A way or opening for entrance into a place; a passage by which a place may be reached; a way of approach or of exit.
- The principal walk or approach to a house which is withdrawn from the road, especially, such approach bordered on each side by trees; any broad passageway thus bordered.
- A method or means by which something may be accomplished.
- A broad street, especially one bordered by trees or, in cities laid out in a grid pattern, one that is on a particular side of the city or that runs in a particular direction.
verb
- To make an opening in; to breach.
- To leave suddenly.
- To notch, as a sword or knife.
- To check the size of a gap.
noun
- A vacancy, deficit, absence, or lack.
- The shortfall between the amount the medical insurer will pay to the service provider and the scheduled fee for the item.
- An opening in anything made by breaking or parting.
- A hiatus, a pause in something which is otherwise continuous.
- An opening allowing passage or entrance.
- An opening that implies a breach or defect.
- (usually written as "the gap") The disparity between the indigenous and non-indigenous communities with regard to life expectancy, education, health, etc.
- An unsequenced region in a sequence alignment.
- The regions between the outfielders.
- A vacant space or time.
- A mountain or hill pass.
- A sheltered area of coast between two cliffs (mostly restricted to place names).
verb
- To cause (a person or animal) to fall or stumble by knocking their feet from under them.
- To raise (an anchor) from the bottom, by its cable or buoy rope, so that it hangs free.
- To fall over or stumble over an object as a result of striking it with one's foot
- To activate or set in motion, as in the activation of a trap, explosive, or switch.
- To be activated, as by a signal or an event
- To become unreasonably upset, especially over something unimportant; to cause a scene or a disruption.
- To pull (a yard) into a perpendicular position for lowering it.
- To be guilty of a misstep or mistake; to commit an offence against morality, propriety, etc
- To experience a state of reverie or to hallucinate, due to consuming psychoactive drugs.
- To journey, to make a trip.
adj
noun
- A quick, light step; a lively movement of the feet; a skip.
- A journey; an excursion or jaunt.
- A stumble or misstep.
- A trip-switch or cut-out.
- Intense involvement in or enjoyment of a condition.
- A flock of wigeons.
- A period of time in which one experiences drug-induced reverie or hallucinations.
- The act of tripping someone, or causing them to lose their footing.
- A single board, or tack, in plying, or beating, to windward.
- A mechanical cutout device.
- A faux pas, a social error.
noun
- The act of slipping, especially from a secure location.
- Movement of earth on a slope, a landslip.
- The amount by which something has slipped.
- A lessening of performance or achievement.
- A decrease in motion, or in the power of a mechanical system due to slipping.
- The difference between estimated and actual transaction costs.
verb
- To move quickly and often secretively; to depart, withdraw, enter, appear, intrude, or escape as if by sliding.
- To release (a dog, a bird of prey, etc.) to go after a quarry.
- To cause to slip or slide off, or out of place.
- To cut slips from; to cut; to take off; to make a slip or slips of.
- To move down; to slide.
- To bring forth (young) prematurely; to slink.
- To accidentally reveal a secret or otherwise say something unintentional.
- To cause to move smoothly and quickly; to slide; to convey gently or secretly.
- To pass (a note, money, etc.), often covertly.
- To lose one’s traction on a slippery surface; to slide due to a lack of friction.
- To err.
- To move or fly (out of place); to shoot; often with out, off, etc.
- To remove the skin of a soft fruit, such as a tomato or peach, by blanching briefly in boiling water, then transferring to cold water so that the skin peels, or slips, off easily.
- To cause (a schedule or release, etc.) to go, or let it go, beyond the allotted deadline.
noun
- A number between 0 and 1 that is the difference between the angular speed of a rotating magnetic field and the angular speed of its rotor, divided by the angular speed of the magnetic field.
- A fish, the sole.
- A woman's undergarment worn under a skirt or dress to conceal unwanted nudity that may otherwise be revealed by the skirt or dress itself; a shift.
- An escape; a secret or unexpected desertion.
- A young person (now usually with of introducing descriptive qualifier).
- The motion of the centre of resistance of the float of a paddle wheel, or the blade of an oar, through the water horizontally, or the difference between a vessel's actual speed and the speed it would have if the propelling instrument acted upon a solid; also, the velocity, relatively to still water, of the backward current of water produced by the propeller.
- The difference between the actual and synchronous speeds of an induction motor.
- A slipway.
- A dislocation of a lead, destroying continuity.
- A small piece of paper, especially one longer than it is wide, typically a form for writing on or one giving printed information.
- Any of several fielding positions to the off side of the wicket keeper, designed to catch the ball after being deflected from the bat; a fielder in that position (See first slip, second slip, third slip, fourth slip and fifth slip.)
- A twig or shoot; a cutting.
- A particular quantity of yarn.
- Matter found in troughs of grindstones after the grinding of edge tools.
- A thin, slippery mix of clay and water.
- A slipdress.
- An act or instance of slipping.
- The positional displacement in a sequence of transmitted symbols that causes the loss or insertion of one or more symbols.
- A mistake or error.
- A long, thin piece of something.
- A difference between the theoretical distance traveled per revolution of the propeller and the actual advance of the vessel.
- A memorandum of the particulars of a risk for which a policy is to be executed. It usually bears the broker's name and is initiated by the underwriters.
- A long seat or narrow pew in churches, often without a door.
- An outside covering or case.
- A one-time return to previous maladaptive behaviour after cure.
- A leash or string by which a dog is held; so called from its being made in such a manner as to slip, or become loose, by relaxation of the hand.
- A berth; a space for a ship to moor.
noun
- An enlarged space in an underground tunnel of a burrowing animal.
- One of the bullet-holding compartments in the cylinder of a revolver.
- The legislature or division of the legislature itself.
- The room used for deliberation by a legislature.
- Any enclosed space occupying or similar to a room.
- A short piece of ordnance or cannon which stood on its breech without any carriage, formerly used chiefly for celebrations and theatrical cannonades.
- The private office of a judge.
- One of the two atria or two ventricles of the heart.
- The private room of an individual, especially of someone wealthy or noble.
- A single law office in a building housing several.
- The area holding the ammunition round at the initiation of its discharge.
- A bedroom.
verb
- To place in a chamber, as a round of ammunition.
- To reside in or occupy a chamber or chambers.
- To create or modify a gun to be a specific caliber.
- To enclose in a room.
- To prepare an offensive, defensive, or counteroffensive action by drawing a limb or weapon to a position where it may be charged with kinetic energy.
verb
- descend into or as if into some soft substance or place
- fall or descend to a lower place or level
- cause to sink
- pass into a specified state or condition; sink into
- go under
- appear to move downward
- fall heavily or suddenly; decline markedly
- fall or sink heavily
- embed deeply
noun
- plumbing fixture consisting of a water basin fixed to a wall or floor and having a drainpipe
- (technology) a process that acts to absorb or remove energy or a substance from a system
- a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
- a covered cistern; waste water and sewage flow into it
noun
- A small cavern or hollow place in the side of a hill, or among rocks; especially, a cave used by a wild animal for shelter or concealment.
- Synonym of fort (“structure improvised from furniture, etc. for playing games.”)
- A comfortable room not used for formal entertaining.
- A group of Cub Scouts of the same age who work on projects together.
- A squalid or wretched place; a haunt.
verb
verb
- move away or escape suddenly
- terminate or end
- become separated into pieces or fragments
- render inoperable or ineffective
- ruin completely
- destroy the integrity of; usually by force; cause to separate into pieces or fragments
- act in disregard of laws, rules, contracts, or promises
- scatter or part
- force out or release suddenly and often violently something pent up
- prevent completion
- enter someone's (virtual or real) property in an unauthorized manner, usually with the intent to steal or commit a violent act
- make submissive, obedient, or useful
- fail to agree with; be in violation of; as of rules or patterns
- surpass in excellence
- make known to the public information that was previously known only to a few people or that was meant to be kept a secret
- come into being
- stop operating or functioning
- interrupt a continued activity
- make a rupture in the ranks of the enemy or one's own by quitting or fleeing
- curl over and fall apart in surf or foam, of waves
- lessen in force or effect
- be broken in
- come to an end
- vary or interrupt a uniformity or continuity
- cause to give up a habit
- give up
- come forth or begin from a state of latency
- happen or take place
- cause the failure or ruin of
- invalidate by judicial action
- discontinue an association or relation; go different ways
- assign to a lower position; reduce in rank
- reduce to bankruptcy
- change directions suddenly
- emerge from the surface of a body of water
- break down, literally or metaphorically
- do a break dance
- exchange for smaller units of money
- destroy the completeness of a set of related items
- make the opening shot that scatters the balls
- separate from a clinch, in boxing
- go to pieces
- break a piece from a whole
- become punctured or penetrated
- pierce or penetrate
- be released or become known; of news
- cease an action temporarily
- interrupt the flow of current in
- undergo breaking
- find a flaw in
- find the solution or key to
- change suddenly from one tone quality or register to another
- happen
- become fractured; break or crack on the surface only
- crack; of the male voice in puberty
- fall sharply
- fracture a bone of
- diminish or discontinue abruptly
- weaken or destroy in spirit or body
noun
- some abrupt occurrence that interrupts an ongoing activity
- an unexpected piece of good luck
- (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
- a personal or social separation (as between opposing factions)
- a pause from doing something (as work)
- the act of breaking something
- a time interval during which there is a temporary cessation of something
- breaking of hard tissue such as bone
- the occurrence of breaking
- an abrupt change in the tone or register of the voice (as at puberty or due to emotion)
- the opening shot that scatters the balls in billiards or pool
- (tennis) a score consisting of winning a game when your opponent was serving
- an act of delaying or interrupting the continuity
- a sudden dash
- any frame in which a bowler fails to make a strike or spare
- an escape from jail
noun
- An escape or means of escape.
- The contrivance in a timepiece (winding wristwatch) which connects the train of wheel work with the pendulum or balance, giving to the latter the impulse by which it is kept in vibration.
- The number of fish that escape commercial fishing operations and travel upstream to spawn.
- A mechanism found in devices such as a typewriter or printer which controls lateral motion of the carriage.
verb
- To shut up or confine in a narrow habitation; to cage; to cramp.
- To crowd together, or to be confined, as if in a crib or in narrow accommodations.
- To seize the manger or other solid object with the teeth and draw in wind.
- To place or confine in a crib.
- To plagiarize; to copy; to cheat.
- To collect one or more passages and/or references for use in a speech, written document or as an aid for some task; to create a crib sheet.
- To complain, to grumble
- To install timber supports, as with cribbing.
noun
- A small room or covered structure, especially one of rough construction, used for storage or penning animals.
- A collection of quotes or references for use in speaking, for assembling a written document, or as an aid to a project of some sort; a crib sheet.
- A literal translation, usually of a work originally in Latin or Ancient Greek.
- A bed for a child older than a baby.
- One’s residence, house or dwelling place, or usual place of resort.
- A bin for drying or storing grain, as with a corn crib.
- A manger, a feeding trough for animals elevated off the earth or floor, especially one for fodder such as hay.
- A wicker basket.
- A hovel, a roughly constructed building best suited to the shelter of animals but used for human habitation.
- The card game cribbage.
- A small holiday home, often near a beach and of simple construction.
- A small raft made of timber.
- A baby’s bed with high, often slatted, often moveable sides, suitable for a child who has outgrown a cradle or bassinet.
- A snack or packed lunch, especially as taken to work to eat during a break.
- A confined space, as with a cage or office-cubicle
- A small sleeping berth in a packet ship or other small vessel
- The cards discarded by players and used by the dealer.
- A boxy structure traditionally built of heavy wooden timbers, to support an existing structure from below, as with a mineshaft or a building being raised off its foundation in preparation for being moved; see cribbing.
- The baby Jesus and the manger in a creche or nativity scene, consisting of statues of Mary, Joseph and various other characters such as the magi.
- A known piece of information corresponding to a section of encrypted text, that is then used to work out the remaining sections.
- A cheat sheet or past test used by students; crib sheet.
verb
- To retreat from action or danger; to withdraw for safety or pleasure.
- To stop working on a permanent basis, usually because of old age or illness.
- To cease use or production of something.
- To go back or return; to withdraw or retreat, especially from public view; to go into privacy.
- To fit (a vehicle) with new tires.
- To recede; to fall or bend back.
- To go to bed.
- To withdraw; to take away.
- To voluntarily stop batting before being dismissed so that the next batsman can bat.
- To withdraw from circulation, or from the market; to take up and pay.
- To cause to retire; specifically, to designate as no longer qualified for active service; to place on the retired list.
- To make a play which results in a runner or the batter being out, either by means of a put out, fly out or strikeout.
noun
noun
- An unusual and extensive irruption of a species of animals into another region.
- An affliction or disaster attributed to destiny, or to God.
- A punishment or blessing ordained by God.
- The right of a separated or divorced parent to visit a child; access.
- The act of visiting, or an instance of being visited.
- An encounter with supernatural beings such as ghosts or aliens.
- An official visit to inspect or examine something.
verb
- To surreptitiously penetrate, enter or gain access to.
- To cause to penetrate in this way.
- To invade or penetrate a tissue or organ.
- To send (soldiers, spies, etc.) through gaps in the enemy line.
- To pass through something by filtration.
- To move from a vein, remaining in the body.
- To cause (a liquid) to pass through something by filtration.
noun
verb
- To break in (an animal).
- For a headline to exceed the amount of space reserved for it.
- To catch (someone) in the act of doing something wrong, socially and morally inappropriate, or illegal, especially when being done in a sneaky or secretive state.
- To arrest (someone) for a crime.
- To undo a trade, generally an error trade, that has already been executed.
- To break in (a woman or girl), To deflower
- To break.
- To exceed a score of 21.
- An emphatic synonym of do or get.
- To ejaculate; to eject semen.
- To refute an established opening.
- To lose all of one's chips.
- To reduce in rank.
adj
noun
- A police raid or takedown of a criminal enterprise.
- The act of arresting someone for a crime, or raiding a suspected criminal operation.
- A refutation of an opening, or of a previously published analysis.
- A player who fails to meet expectations.
- A failed enterprise; a bomb.
- A sculptural portrayal of a person's head and shoulders.
- The downward portion of a boom and bust cycle; a recession.
- A disappointment.
- The breasts and upper thorax of a woman.
noun
- The process of exiting an area (usually behind enemy lines or in enemy territory).
- Covert extraction of data.
- A filtering out (usually movement of a substance through a barrier).
- A method for managing storm water runoff.
- A gradual movement of a substance to exterior (as through cell membrane to extracellular fluid or medium).
noun
- Opportunity of escape or passage from confinement or privacy; outlet.
- An opening in a volcano from which lava or gas flows.
- A small aperture.
- The opening at the breech of a firearm, through which fire is communicated to the powder of the charge.
- Ventriloquism.
- A slit in the seam of a garment.
- Emission; escape; passage to notice or expression; publication; utterance.
- An opening through which gases, especially air, can pass.
- The excretory opening of lower orders of vertebrates.
- A rant; a long session of expressing verbal frustration.
- In steam boilers, a sectional area of the passage for gases divided by the length of the same passage in feet.
verb
noun
adj
- Descending far below the surface; opening or reaching to great depth; deep.
- Intellectually deep; entering far into subjects; reaching to the bottom of a matter, or of a branch of learning; thorough
- Very deep; very serious
- Characterized by intensity; deeply felt; pervading
- Bending low, exhibiting or expressing deep humility; lowly; submissive
noun
- An artificial cavern-like retreat.
- A small cave.
- A Marian shrine, usually built in a cavern-like structure.
- A local organization of cavers that typically organizes trips to caves and provides information and training for caving; a caving club.
- A secretive name for a local group of underground Satanists.
noun
- a trap in the form of a concealed hole
- a sizeable hole (usually in the ground)
- a concavity in a surface (especially an anatomical depression)
- the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed
- (Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment
- an enclosure in which animals are made to fight
- (commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on
- (auto racing) an area at the side of a racetrack where the race cars are serviced and refueled
- a surface excavation for extracting stone or slate
- lowered area in front of a stage where an orchestra accompanies the performers
- a workplace consisting of a coal mine plus all the buildings and equipment connected with it
verb
verb
- To thrust in; to cause to enter or penetrate.
- To hit.
- To give, as a blow; to impel, as with a blow; to give a force to; to dash; to cast.
- To create an impression.
- To cut off (a mortar joint, etc.) even with the face of the wall, or inward at a slight angle.
- To affect by a sudden impression or impulse.
- To sound by percussion, with blows, or as if with blows.
- To haul down or lower (a flag, mast, etc.)
- To make a sudden impression upon, as if by a blow; to affect with some strong emotion.
- To balance (a ledger or account).
- To dismantle and take away (a theater set; a tent; etc.).
- To hit upon, or light upon, suddenly.
- To cause or produce by a stroke, or suddenly, as by a stroke.
- To become attached to something; said of the spat of oysters.
- To stroke or pass lightly; to wave.
- To act suddenly, especially in a violent or criminal way.
- To impress, seem or appear (to).
- To capitulate; to signal a surrender by hauling down the colours.
- To level (a measure of grain, salt, etc.) with a straight instrument, scraping off what is above the level of the top.
- To impinge upon.
- To discover a source of something, often a buried raw material such as ore (especially gold) or crude oil.
- To pass with a quick or strong effect; to dart; to penetrate.
- To touch; to act by appulse.
- To manufacture, as by stamping.
- To make and ratify.
- To deliver a quick blow or thrust; to give blows.
- To cause to sound by one or more beats; to indicate or notify by audible strokes. Of a clock, to announce (an hour of the day), usually by one or more sounds.
- To cause to ignite by friction.
- To delete or cross out; to scratch or eliminate.
- To set off on a walk or trip.
- To score a goal.
- To punish; to afflict; to smite.
- To carry out a violent or illegal action.
- To unfasten, to loosen (chains, bonds, etc.).
- To stop working as a protest to achieve better working conditions.
noun
- A nibble on the bait by a fish.
- In an option contract, the price at which the holder buys or sells if they choose to exercise the option.
- The strike plate of a door.
- A cancellation postmark.
- An iron pale or standard in a gate or fence.
- The primary face of a hammer, opposite the peen.
- An instrument with a straight edge for levelling a measure of grain, salt, etc., scraping off what is above the level of the top; a strickle.
- A status resulting from a batter swinging and missing a pitch, or not swinging at a pitch when the ball goes in the strike zone, or hitting a foul ball that is not caught.
- The status of being the batsman that the bowler is bowling at.
- The act of knocking down all ten pins in on the first roll of a frame.
- An old English measure of corn equal to the bushel.
- A blow or application of physical force against something.
- A work stoppage (or otherwise concerted stoppage of an activity) as a form of protest.
- The compass direction of the line of intersection between a rock layer and the surface of the Earth.
- The discovery of a source of something.
- A puddler's stirrer.
noun
- A small or narrow opening, gap, slit, or hole.
- The diameter of such a hole which restricts the width of the lightpath through the whole system. For a telescope, this is the diameter of the objective lens.
- A hole which restricts the diameter of the lightpath through one plane in an optical system.
- The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array.
- The maximum angle between the two generatrices.
English words for 'A hole or retreat onto which an animal may creep, to escape notice or danger.'
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