Word.ws English Dictionary

ephemerides

UK/ˌɛfɪˈmɛɹɪdiːz//ˌɛfəˈmɛɹədiz/

ephemerides is the plural of ephemeris.

Meaning of ephemeris

Noun

ephemeris (plural ephemerides or 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.1638, Thomas Herbert, Some Yeares Travels, section I
  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.1792, William Bligh, chapter 13, in A Voyage to the South Sea
    Synonyms:
    almanac
  3. Computer software that calculates the apparent position of celestial bodies.

Noun

ephemerides

  1. (plural taken as singular) An ephemeris.
    • Or let him [that is melancholy] calculate Sphæricall Triangles, caſt a Natiuity, make an Ephemerides, read Suiſſet the Calculators vvorkes, Scaliger de emendatione temporum, till he vnderſtand it, read Scotus and Suarez Metaphyſicks, or Schoole Divinity, Occam, Entisberus, Durand &c.1624, Democritus Junior [pseudonym; Robert Burton], “Exercise rectified of Body and Minde”, in The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: […] John Lichfield and James Short...

Questions about ephemerides

What does ephemerides mean?
Ephemerides means an ephemeris.
What is ephemerides the plural of?
Ephemerides is the plural of ephemeris.
What part of speech is ephemerides?
Ephemerides is a noun.
How do you pronounce ephemerides?
Ephemerides is pronounced /ˌɛfɪˈmɛɹɪdiːz/ (UK).

Words near ephemerides in the dictionary

  1. ephemerellid
  2. ephemerellids
  3. ephemeric
  4. ephemerid
  5. ephemeride
  6. ephemerides
  7. ephemerids
  8. ephemeris
  9. ephemeris time
  10. ephemerises
  11. ephemerist

Source and license

Adapted from Wiktionary: ephemerides (page history and authors); ephemeris (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Wodencafe-ephemerides.wav.

Cite this entry: “ephemerides.” Word.ws, https://word.ws/ephemerides. Based on Wiktionary, CC BY-SA 4.0.