(n) (astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Earth's motions, Syn.terrestrial dynamical time, TT, ephemeris time, TDT
The Collaborative International Dictionary of English (GCIDE) v.0.53
n.; pl.Ephemerides [ L., a diary, Gr. &unr_;, also, a calendar, fr. &unr_;. See Ephemera. ] 1. A diary; a journal. Johnson. [ 1913 Webster ]
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. [ 1913 Webster ]
3. (Literature) A collective name for reviews, magazines, and all kinds of periodical literature. Brande & C. [ 1913 Webster ]
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เช่น Secretary of State=รัฐมนตรีต่างประเทศของสหรัฐฯ (ในภาพตัวอย่าง),
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