Library / English Dictionary

    EPHEMERIS TIME

    Pronunciation (US): Play  (GB): Play

     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 motionsplay

    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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