Heliometer
noun
noun ·Rare ·Advanced level
Definitions
Noun
- 1 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.
- 2 an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope wordnet
Etymology
From helio- + -meter, from Ancient Greek Ἥλιος (Hḗlios), from ἥλιος (hḗlios, “sun”), and French mètre, from Ancient Greek μέτρον (métron, “measure”).
Related phrases
More for "heliometer"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.