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