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EPHEMERIS

 - 2 dictionary results

e⋅phem⋅er⋅is

  [i-fem-er-is]
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–noun, plural e⋅phe⋅mer⋅i⋅des  [ef-uh-mer-i-deez] .
1. a table showing the positions of a heavenly body on a number of dates in a regular sequence.
2. an astronomical almanac containing such tables.
3. Archaic. an almanac or calendar.
Origin:
1545–55; < L ephēmeris day book, diary < Gk ephēmerís diary, account book, deriv. of ephmeros; see ephemeral
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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e·phem·er·is   (ĭ-fěm'ər-ĭs)   
n.   pl. eph·e·mer·i·des (ěf'ə-měr'ə-dēz')
A table giving the coordinates of a celestial body at a number of specific times during a given period.

[Late Latin ephēmeris, from Greek, diary, from ephēmeros, daily; see ephemeral.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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