terrestrial dynamical time terrestrial • terrestrial guidance · · · Info · Definitions · Synonyms · Characters · · terrestrial dynamical time · · Text Common · · Latin · · Scripts 26 · · Length 8 · · Syllables Definitions · · · (noun) (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: terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris time. · · Noun Definition 1 Synonyms · · · terrestrial time · · Synonym 1 tt · · Synonym 2 tdt · · Synonym 3 ephemeris time · · Synonym 4 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 y latin small letter y U+0079