EPHEMERIS

ephemeris

(noun) an annual publication containing astronomical tables that give the positions of the celestial bodies throughout the year; “today computers calculate the ephemerides”

Source: WordNet® 3.1

Etymology

Noun

ephemeris (plural ephemerides or ephemerises)

(obsolete, singular or plural) A journal or diary.

(astronomy) A table giving the apparent position of celestial bodies throughout the year; normally given as right ascension and declination.

Software that calculates the apparent position of celestial bodies.

Source: Wiktionary

E*phem"e*ris, n.; pl. Ephemerides. Etym: [L., a diary, Gr. Ephemera.]

1. A diary; a journal. Johnson.

2. (Anat.) (a) A publication giving the computed places of the heavenly bodies for each day of the year, with other numerical data, for the use of the astronomer and navigator; an astronomical almanac; as, the "American Ephemeris and Nautical Almanac." (b) Any tabular statement of the assigned places of a heavenly body, as a planet or comet, on several successive days.

3. (Literature)

Definition: A collective name for reviews, magazines, and all kinds of periodical literature. Brande & C.

Source: Webster’s Unabridged Dictionary 1913 Edition