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Added 9 October 2026

ephemeris

/ɪˈfɛməɹɪs/ noun

Latin root: ephēmeris Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about ephemeris at Wordnik → Where our words come from →

A journal or diary.
A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination.
Computer software that calculates the apparent position of celestial bodies.

Origin

From New Latin ephēmeris, from Ancient Greek ἐφημερίς (ephēmerís, “diary, calendar”), from ἐφήμερος (ephḗmeros, “daily”).

From Wiktionary, via Kaikki.org (CC BY-SA)

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