Parole in English per 'A single-atom thick two-dimensional layer of atoms.'
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suffix
- A single-atom thick two-dimensional layer of atoms.
- Forms adjectives and nouns denoting religious groups from personal names.
- Forms adjectives relating to places and nouns for their inhabitants.
- A polymer derived from an alkene.
- (organic chemistry) An aromatic hydrocarbon based on benzene.
- (organic chemistry) An unsaturated hydrocarbon having at least one double bond; an alkene.
noun
- A single atom of this element.
- A nonmetallic chemical element (symbol Se) with an atomic number of 34, used mainly in glassmaking and pigments and as a semiconductor.
- a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)
noun
- A single atom of this element.
- A metallic chemical element (symbol Tl) with atomic number 81: a gray post-transition metal that discolors when exposed to air.
- a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores
noun
- a theory of the structure of the atom
- (physics) Any of several theories that explain the structure of the atom, and of subatomic particles.
- (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles
- (physics) The theory that all gross matter is composed of atoms.
adj
- containing a closed ring of atoms of which at least one is not a carbon atom
- (chemistry, of a cyclic compound) Having atoms of two or more different elements in at least one of its rings.
- (organic chemistry, of a cyclic compound) Having one or more atoms other than carbon in at least one of its rings.
noun
noun
- a brittle transparent solid with irregular atomic structure
- a container made of glass for holding liquids while drinking
- a small refracting telescope
- the quantity a glass will hold
- a mirror; usually a ladies' dressing mirror
- an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
- glassware collectively
- (countable, uncountable, by extension) Any amorphous solid (one without a regular crystal lattice).
- A mirror.
- (countable) A vessel from which one drinks, especially one made of glass, plastic, or similar translucent or semi-translucent material.
- (attributive, in names of species) Transparent or translucent.
- A barometer.
- (basketball, colloquial) The backboard.
- (metonymic) The quantity of liquid contained in such a vessel.
- A magnifying glass or loupe.
- (uncountable, photography, informal) Lenses, considered collectively.
- (uncountable) Glassware.
- A telescope.
- (usually uncountable) An amorphous solid, often transparent substance, usually made by melting silica sand with various additives (for most purposes, a mixture of soda, potash and lime is added).
- (ice hockey) The clear, protective screen surrounding a hockey rink.
verb
- put in a glass container
- furnish with glass
- scan (game in the forest) with binoculars
- become glassy or take on a glass-like appearance
- enclose with glass
- (transitive) To smooth or polish (leather, etc.), by rubbing it with a glass burnisher.
- (transitive) To fit with glass; to glaze.
- (transitive, science fiction) To bombard an area with such intensity (by means of a nuclear bomb, fusion bomb, etc) as to melt the landscape into glass.
- (transitive, UK, colloquial) To strike (someone), particularly in the face, with a drinking glass with the intent of causing injury.
- (intransitive) To become glassy.
- (transitive) To view through an optical instrument such as binoculars.
- (transitive) To make glassy.
- (transitive) Clipping of fibreglass (“to fit, cover, fill, or build, with fibreglass-reinforced resin composite (fiberglass)”).
- (transitive) To enclose in glass.
noun
- (countable) A single atom of this element.
- The chemical element (symbol Ar) with an atomic number of 18. The third most abundant gas in the Earth's atmosphere, it is a colourless, odourless, inert noble gas.
- a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
noun
- (countable) A single atom of this element.
- A toxic grey brittle nonmetallic chemical element (symbol As) with an atomic number of 33.
- Arsenic trioxide.
- a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
- a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and in various alloys; found in arsenopyrite and orpiment and realgar
adj
noun
- (countable) A single atom of this element.
- A toxic, green, gaseous chemical element (symbol Cl) with an atomic number of 17.
- (countable) A chlorine-based bleach or disinfectant.
- a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)
noun
noun
- (countable) A single atom of this element.
- (uncountable) A chemical element (symbol Ir) with an atomic number of 77: a very hard, brittle, silvery-white transition metal of the platinum group.
- a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
noun
- (countable) A single atom of this element.
- (uncountable) The simplest alkali metal, the lightest solid element, and the third lightest chemical element (symbol Li) with an atomic number of 3 and atomic weight of 6.94. It is a soft, silvery metal.
- (countable) A lithium battery.
- (pharmacology, uncountable) Lithium carbonate or other preparations of lithium metal used as a mood stabiliser to treat manic depression and bipolar disorders.
- a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
noun
- (countable) A single atom of this element.
- (uncountable) A metallic chemical element (symbol Mn) with an atomic number of 25, not a free element in nature but often found in minerals in combination with iron, and useful in industrial alloy production.
- a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
noun
- (countable) A single atom of this element.
- A chemical element (symbol Nd) with an atomic number of 60: a hard, slightly malleable silvery rare earth metal that quickly tarnishes in air and moisture.
- a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
noun
- (countable) A single atom of this element.
- A chemical element (symbol Os) with atomic number 76: a hard, brittle, heavy, bluish-white transition metal found as a trace element in alloys, mostly in platinum ores.
- a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
noun
- (countable) A single atom of this element.
- A chemical element (symbol Pd) with an atomic number of 46: a rare, lustrous silvery-white metal.
- A safeguard.
- a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry
noun
- (countable) A single atom of this element.
- A soft, waxy, silvery reactive metal that is never found unbound in nature; an element with atomic number 19 and atomic weight of 39.0983.
- a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite
noun
- (countable) A single atom of this element.
- A metallic chemical element (symbol Re) with an atomic number of 75: a heavy, silvery-gray transition metal.
- a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum
noun
- (countable) A single atom of this element.
- (uncountable) The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.
- a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
noun
- (countable) A single atom of this element.
- The metallic chemical element (symbol Sr) with an atomic number of 38. It is a soft, reactive, silvery alkaline earth metal.
- a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
noun
- (countable) A single atom of this element.
- Alternative form of tellurion.
- (uncountable) The chemical element with atomic number 52. Symbol: Te. A rare, brittle, mildly toxic, silver-white metalloid.
- a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold
noun
- (countable) A single atom of this element.
- A chemical element, atomic number 22; it is a strong, corrosion-resistant transition metal, used to make light alloys for aircraft etc.
- a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite
noun
- (countable) A single atom of this element.
- A chemical element (symbol V) with atomic number 23; it is a transition metal, used in the production of special steels.
- a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite
noun
- (countable) A single atom of this element.
- A chemical element (symbol Zn) with an atomic number of 30, a blue-silvery metal that is slightly brittle at room temperature and tarnishes slightly in moist air.
- (Nigeria) A corrugated iron roof.
- a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blende
verb
noun
- (chemistry, countable) A single atom of this element.
- (uncountable) The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.
- a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
noun
- (chemistry, countable) A single atom of this element.
- (chemistry, uncountable) A nonmetallic element (symbol Si) with an atomic number of 14 and atomic weight of 28.0855.
- Abbreviation of silicon chip.
- (slang) A computer processor.
- (slang) Computing.
- a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
noun
- a 3-dimensional geometric arrangement of the atoms or molecules or ions composing a crystal
- (geometry, crystallography) An infinite array of discrete points generated by a set of discrete translation operations mathbf R=n_1 mathbf a₁+n_2 mathbf a₂+n_3 mathbf a₃, where nᵢ are any integers and aᵢ are known as the primitive vectors which lie in different directions and span the lattice.
noun
- (countable) An atom of this element.
- The chemical element with atomic number 20: a soft, silvery-white alkaline earth metal which occurs naturally as carbonate in limestone and as silicate in many rocks.
- a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
noun
- (countable) An atom of this element.
- A nonmetallic chemical element (symbol Ge) with an atomic number of 32: a lustrous, hard-brittle, grayish-white metalloid in the carbon group.
- a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite
noun
- (countable) An atom of this element.
- (uncountable) Synonym of protium (“the lightest and most common isotope of hydrogen (sense 1; symbol H, ¹H, or 11H), as contrasted with deuterium and tritium”).
- (uncountable) The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.
- (countable) A molecule of this molecular species.
- (uncountable) Molecular hydrogen (sense 1; symbol H₂), a colourless, odourless and flammable gas at room temperature.
- a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
noun
- (countable) An atom of this element.
- (uncountable) The chemical element (symbol Kr) with an atomic number of 36. It is a colourless, odourless noble gas that only reacts with fluorine. It is one of the rarest gases in the Earth's atmosphere.
- a colorless element that is one of the six inert gasses; occurs in trace amounts in air
noun
- (countable) An atom of this element.
- (uncountable) A chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
- a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
noun
- (countable) An atom of this element.
- The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Sometimes called elemental oxygen to distinguish it from molecular oxygen.
- (medicine) A mixture of oxygen and other gases, administered to a patient to help them breathe.
- (figurative) A condition or environment in which something can thrive.
- (loose but very common, even in formal use) Molecular oxygen (O₂), a colorless, odorless gas at room temperature.
- a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
noun
- A single atom of this element.
- A nonmetallic chemical element (symbol Se) with an atomic number of 34, used mainly in glassmaking and pigments and as a semiconductor.
- a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)
noun
- A single atom of this element.
- A metallic chemical element (symbol Tl) with atomic number 81: a gray post-transition metal that discolors when exposed to air.
- a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores
noun
- a theory of the structure of the atom
- (physics) Any of several theories that explain the structure of the atom, and of subatomic particles.
- (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles
- (physics) The theory that all gross matter is composed of atoms.
noun
- a brittle transparent solid with irregular atomic structure
- a container made of glass for holding liquids while drinking
- a small refracting telescope
- the quantity a glass will hold
- a mirror; usually a ladies' dressing mirror
- an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
- glassware collectively
- (countable, uncountable, by extension) Any amorphous solid (one without a regular crystal lattice).
- A mirror.
- (countable) A vessel from which one drinks, especially one made of glass, plastic, or similar translucent or semi-translucent material.
- (attributive, in names of species) Transparent or translucent.
- A barometer.
- (basketball, colloquial) The backboard.
- (metonymic) The quantity of liquid contained in such a vessel.
- A magnifying glass or loupe.
- (uncountable, photography, informal) Lenses, considered collectively.
- (uncountable) Glassware.
- A telescope.
- (usually uncountable) An amorphous solid, often transparent substance, usually made by melting silica sand with various additives (for most purposes, a mixture of soda, potash and lime is added).
- (ice hockey) The clear, protective screen surrounding a hockey rink.
verb
- put in a glass container
- furnish with glass
- scan (game in the forest) with binoculars
- become glassy or take on a glass-like appearance
- enclose with glass
- (transitive) To smooth or polish (leather, etc.), by rubbing it with a glass burnisher.
- (transitive) To fit with glass; to glaze.
- (transitive, science fiction) To bombard an area with such intensity (by means of a nuclear bomb, fusion bomb, etc) as to melt the landscape into glass.
- (transitive, UK, colloquial) To strike (someone), particularly in the face, with a drinking glass with the intent of causing injury.
- (intransitive) To become glassy.
- (transitive) To view through an optical instrument such as binoculars.
- (transitive) To make glassy.
- (transitive) Clipping of fibreglass (“to fit, cover, fill, or build, with fibreglass-reinforced resin composite (fiberglass)”).
- (transitive) To enclose in glass.
noun
- (countable) A single atom of this element.
- The chemical element (symbol Ar) with an atomic number of 18. The third most abundant gas in the Earth's atmosphere, it is a colourless, odourless, inert noble gas.
- a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere
noun
- (countable) A single atom of this element.
- A toxic grey brittle nonmetallic chemical element (symbol As) with an atomic number of 33.
- Arsenic trioxide.
- a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
- a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and in various alloys; found in arsenopyrite and orpiment and realgar
adj
noun
- (countable) A single atom of this element.
- A toxic, green, gaseous chemical element (symbol Cl) with an atomic number of 17.
- (countable) A chlorine-based bleach or disinfectant.
- a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)
noun
noun
- (countable) A single atom of this element.
- (uncountable) A chemical element (symbol Ir) with an atomic number of 77: a very hard, brittle, silvery-white transition metal of the platinum group.
- a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
noun
- (countable) A single atom of this element.
- (uncountable) The simplest alkali metal, the lightest solid element, and the third lightest chemical element (symbol Li) with an atomic number of 3 and atomic weight of 6.94. It is a soft, silvery metal.
- (countable) A lithium battery.
- (pharmacology, uncountable) Lithium carbonate or other preparations of lithium metal used as a mood stabiliser to treat manic depression and bipolar disorders.
- a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
noun
- (countable) A single atom of this element.
- (uncountable) A metallic chemical element (symbol Mn) with an atomic number of 25, not a free element in nature but often found in minerals in combination with iron, and useful in industrial alloy production.
- a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
noun
- (countable) A single atom of this element.
- A chemical element (symbol Nd) with an atomic number of 60: a hard, slightly malleable silvery rare earth metal that quickly tarnishes in air and moisture.
- a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
noun
- (countable) A single atom of this element.
- A chemical element (symbol Os) with atomic number 76: a hard, brittle, heavy, bluish-white transition metal found as a trace element in alloys, mostly in platinum ores.
- a hard brittle blue-grey or blue-black metallic element that is one of the platinum metals; the heaviest metal known
noun
- (countable) A single atom of this element.
- A chemical element (symbol Pd) with an atomic number of 46: a rare, lustrous silvery-white metal.
- A safeguard.
- a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry
noun
- (countable) A single atom of this element.
- A soft, waxy, silvery reactive metal that is never found unbound in nature; an element with atomic number 19 and atomic weight of 39.0983.
- a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite
noun
- (countable) A single atom of this element.
- A metallic chemical element (symbol Re) with an atomic number of 75: a heavy, silvery-gray transition metal.
- a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys; is obtained as a by-product in refining molybdenum
noun
- (countable) A single atom of this element.
- (uncountable) The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.
- a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
noun
- (countable) A single atom of this element.
- The metallic chemical element (symbol Sr) with an atomic number of 38. It is a soft, reactive, silvery alkaline earth metal.
- a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
noun
- (countable) A single atom of this element.
- Alternative form of tellurion.
- (uncountable) The chemical element with atomic number 52. Symbol: Te. A rare, brittle, mildly toxic, silver-white metalloid.
- a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold
noun
- (countable) A single atom of this element.
- A chemical element, atomic number 22; it is a strong, corrosion-resistant transition metal, used to make light alloys for aircraft etc.
- a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite
noun
- (countable) A single atom of this element.
- A chemical element (symbol V) with atomic number 23; it is a transition metal, used in the production of special steels.
- a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite
noun
- (countable) A single atom of this element.
- A chemical element (symbol Zn) with an atomic number of 30, a blue-silvery metal that is slightly brittle at room temperature and tarnishes slightly in moist air.
- (Nigeria) A corrugated iron roof.
- a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blende
verb
noun
- (chemistry, countable) A single atom of this element.
- (uncountable) The chemical element (symbol F) with an atomic number of 9. It is the lightest of the halogens, a pale yellow-green, highly reactive gas that attacks all metals.
- a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite
noun
- (chemistry, countable) A single atom of this element.
- (chemistry, uncountable) A nonmetallic element (symbol Si) with an atomic number of 14 and atomic weight of 28.0855.
- Abbreviation of silicon chip.
- (slang) A computer processor.
- (slang) Computing.
- a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
noun
- a 3-dimensional geometric arrangement of the atoms or molecules or ions composing a crystal
- (geometry, crystallography) An infinite array of discrete points generated by a set of discrete translation operations mathbf R=n_1 mathbf a₁+n_2 mathbf a₂+n_3 mathbf a₃, where nᵢ are any integers and aᵢ are known as the primitive vectors which lie in different directions and span the lattice.
noun
- (countable) An atom of this element.
- The chemical element with atomic number 20: a soft, silvery-white alkaline earth metal which occurs naturally as carbonate in limestone and as silicate in many rocks.
- a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
noun
- (countable) An atom of this element.
- A nonmetallic chemical element (symbol Ge) with an atomic number of 32: a lustrous, hard-brittle, grayish-white metalloid in the carbon group.
- a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite
noun
- (countable) An atom of this element.
- (uncountable) Synonym of protium (“the lightest and most common isotope of hydrogen (sense 1; symbol H, ¹H, or 11H), as contrasted with deuterium and tritium”).
- (uncountable) The lightest chemical element (symbol H), with an atomic number of 1 and atomic weight of 1.008.
- (countable) A molecule of this molecular species.
- (uncountable) Molecular hydrogen (sense 1; symbol H₂), a colourless, odourless and flammable gas at room temperature.
- a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe
noun
- (countable) An atom of this element.
- (uncountable) The chemical element (symbol Kr) with an atomic number of 36. It is a colourless, odourless noble gas that only reacts with fluorine. It is one of the rarest gases in the Earth's atmosphere.
- a colorless element that is one of the six inert gasses; occurs in trace amounts in air
noun
- (countable) An atom of this element.
- (uncountable) A chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
- a white soft metallic element that tarnishes readily; occurs in rare earth minerals and is usually classified as a rare earth
noun
- (countable) An atom of this element.
- The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Sometimes called elemental oxygen to distinguish it from molecular oxygen.
- (medicine) A mixture of oxygen and other gases, administered to a patient to help them breathe.
- (figurative) A condition or environment in which something can thrive.
- (loose but very common, even in formal use) Molecular oxygen (O₂), a colorless, odorless gas at room temperature.
- a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
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adj
- containing a closed ring of atoms of which at least one is not a carbon atom
- (chemistry, of a cyclic compound) Having atoms of two or more different elements in at least one of its rings.
- (organic chemistry, of a cyclic compound) Having one or more atoms other than carbon in at least one of its rings.