Ephemeris Definition

ĭ-fĕmər-ĭs
ephemerides
noun
A table giving the computed positions of a celestial body for every day of a given period.
Webster's New World
An astronomical almanac containing such tables.
Webster's New World
A calendar or diary.
Webster's New World

Other Word Forms of Ephemeris

Noun

Singular:
ephemeris
Plural:
ephemerides, ephemerises

Origin of Ephemeris

  • Modern Latin, from Ancient Greek ἐφημερίς (ephēmeris, “diary, calendar”), from ἐφήμερος (ephēmeros, “daily”).

    From Wiktionary

  • Late Latin ephēmeris from Greek diary from ephēmeros daily ephemeral

    From American Heritage Dictionary of the English Language, 5th Edition

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