heliometer
Meanings
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.
Pronunciation
Word forms
Etymology
From helio- + -meter, from Ancient Greek Ἥλιος (Hḗlios), from ἥλιος (hḗlios, “sun”), and French mètre, from Ancient Greek μέτρον (métron, “measure”).
Related words
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