Phrase 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.
Sound
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noun
An idealised conception of the celestial sphere in which the celestial equator is perpendicular to the local horizon and the Sun reaches the zenith at its highest point.
Definition source: English Wiktionary via Wiktextract
Usage: singular, singular-only
Topics: astronomy, natural-sciences
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
First attested in 1932; Latin: sphaera (“sphere”, “globe of the heavens”) + rēcta (feminine nominative singular of rēctus, “right”, “upright”) = “upright sphere”.
