absolute system
keratometry
pinpointer
passive gravitational mass
gravitaxic
tattler
isogravitational
telescopical
gravitoelectromagnetism
bigravity
zenith telescope
magnetogravimetric
doorstopper
densitometer
potmeter
gravitropically
air reconnaissance
dioptric
gravistimulation
transit
platometer
potentiometrically
slingshot
telescopic
theodolite
astrointerferometer
rainmeter
transit instrument
refractor
Crookes radiometer
reflector
principle of equivalence
strainometer
raft
astronomy satellite
microgravimetry
perspective glass
astronomical telescope
telescopist
robodoc
thoracometer