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单词 ephemeris
释义

WordReference Random House Unabridged Dictionary of American English © 2024
e•phem•er•is  (i fem′ər is),USA pronunciation n., pl. e•phe•mer•i•des 
    (ef′ə mer′i dēz′).USA pronunciation 
  1. Astronomya table showing the positions of a heavenly body on a number of dates in a regular sequence.
  2. Astronomyan astronomical almanac containing such tables.
  3. [Archaic.]an almanac or calendar.
  • Greek ephēmerís diary, account book, derivative of ephé̄meros; see ephemeral
  • Latin ephēmeris day book, diary
  • 1545–55

Collins Concise English Dictionary © HarperCollins Publishers::
ephemeris /ɪˈfɛmərɪs/ n ( pl ephemerides /ˌɛfɪˈmɛrɪˌdiːz/)
  1. a table giving the future positions of a planet, comet, or satellite
Etymology: 16th Century: from Latin, from Greek: diary, journal; see ephemeral
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更新时间：2024/11/10 19:33:54