(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. Synonyms: ephemeris time, terrestrial dynamical time, terrestrial time, TT.
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Words linked to "TDT" : TT, astronomy, terrestrial time, ephemeris time, unit of time, time unit, uranology, terrestrial dynamical time |
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