EPHEMERIS TIME

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

(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:

ephemeris time; TDT; terrestrial dynamical time; terrestrial time; TT

Classified under:

Nouns denoting time and temporal relations

Hypernyms ("ephemeris time" is a kind of...):

time unit; unit of time (a unit for measuring time periods)

Domain category:

astronomy; uranology (the branch of physics that studies celestial bodies and the universe as a whole)

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