ephemeris

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ephemeris

  • /ɪˈfɛməɹɪs/ UK
  • /ɪˈfɛməɹəs/ US

Where it comes from

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

noun ephemerides · ephemerises

  1. obsolete A journal or diary. Wee heard the King was solacing at the Caspian Sea, whither now wee are travelling. Till then let us keepe an Ephemerides or day-journey.
  2. A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination. […]Mr. Samuel got 150 pounds of bread, with a small quantity of rum and wine, also a quadrant and compass; but he was forbidden on pain of death to touch either map, ephemeris, book of astronomical observations, sextant, timekeeper, or any of my surveys or drawings.

    Similar: almanac

  3. Computer software that calculates the apparent position of celestial bodies.

Translations

Every language

noun table giving the apparent position of celestial bodies throughout the year

Españolefemérides
中文皇曆 /皇历 huánglì
हिन्दीअब्दकोश abdakoś
Portuguêsefeméride
Françaiséphéméride, éphémérides
DeutschEphemeride
Italianoeffemeride
Ελληνικάαστρονομική εφημερίδα astronomikí efimerída
Русскийэфемери́да efemerída

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Cite this
MLA

"ephemeris." Wiktionary, via Micwyn, micwyn.com/word/ephemeris. Accessed 6 Nov. 2026.

APA

ephemeris. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/ephemeris

Chicago

"ephemeris." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/ephemeris.

BibTeX
@misc{ephemeris_2026,
  title = {ephemeris},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/ephemeris},
  urldate = {2026-11-06}
}