Noun: terrestrial 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
"Astronomers use terrestrial time for precise orbital calculations";
- TT, terrestrial dynamical time, TDT, ephemeris time
Derived forms: terrestrial times
Type of: time unit, unit of time
Encyclopedia: Terrestrial time