DICT.TW Dictionary Taiwan
3.138.105.31
Search for:
▼[Show options]
[Pronunciation] [Help] [Database Info] [Server Info]

1 definition found

From: WordNet (r) 2.0

 ephemeris time
      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
           time, TT, terrestrial dynamical time, TDT]