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