noun, plural e·phe·mer·i·des [ef-uh-mer-i-deez] /ˌɛf əˈmɛr ɪˌdiz/.
Origin of ephemeris
Examples from the Web for ephemeris
Its position with respect to Saturn on any given date can be learned from the Ephemeris.Astronomy with an Opera-glass|Garrett Putman Serviss
On a nail by the side of the great fireplace hung proudly and prominently the Family Almanac, the Ephemeris.Customs and Fashions in Old New England|Alice Morse Earle
An Ephemeris is an almanac of the planetary positions day by day throughout any given year.
And now not only is it slightly off course, but so is every ephemeris printed on Mert.Conquest Over Time|Michael Shaara
Take in hand, then, the Ephemeris for the year of your birth and read this chapter with it in view.
British Dictionary definitions for ephemeris
noun plural ephemerides (ˌɛfɪˈmɛrɪˌdiːz)
Word Origin for ephemeris
Word Origin and History for ephemeris
table showing predicted positions of heavenly bodies, 1550s, Modern Latin, from Greek ephemeris "diary, calendar," from ephemeros "daily" (see ephemera). The classical plural is ephemerides.