heliometer

About 0.01 uses per million words.

Meaning

1. noun An astronomical instrument, based on a telescope, for measuring the diameter of the sun; now used to measure the angular distance between stars and other celestial bodies.

Similar words

heliometry heliograph photoheliometer spectroheliometer holometer halometer helioscope spectrohelioscope spectroheliograph solar telescope

Often followed by

measures observations is in of was for and at

Word family

heliometers heliometric heliometrically