English dictionary



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English noun: ephemeris time

1. ephemeris time (time) (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


SynonymsTDT, terrestrial dynamical time, terrestrial time, TT


Broader (hypernym)time unit, unit of time


Domain categoryastronomy, uranology









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