| 单词 | ephemeris |
| 释义 | ephemeris /i fem"euhr is/, n. , pl. ephemerides /ef'euh 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. [1545-55; < L ephemeris day book, diary < Gk ephemerís diary, account book, deriv. of ephémeros; see EPHEMERAL] |
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