Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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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.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
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
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
Broader terms: measuring instrument, measuring system, measuring device
History
From helio- + -meter, from Ancient Greek Ἥλιος (Hḗlios), from ἥλιος (hḗlios, “sun”), and French mètre, from Ancient Greek μέτρον (métron, “measure”).
Across languages
17 source translations are retained for this English entry.
