单词 | ephemeris |
释义 | Word Frequency ephemeris(ɪˈfɛmərɪs) nounWord forms: plural ephemerides (ˌɛfɪˈmɛrɪˌdiːz) 1. a table giving the future positions of a planet, comet, or satellite 2. an annual publication giving the positions of the sun, moon, and planets during the course of a year, information concerning eclipses, astronomical constants, etc 3. obsolete a diary or almanac Word origin C16: from Latin, from Greek: diary, journal; see ephemeral |
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