Search Result：ephemeris time
ephemeris time 
(TTS Sound)
(TTS Sound)Overview of noun ephemeris_time
The noun ephemeris time has 1 sense
- terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris 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)