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Noun: ephemeris time  i'fe-mu-ris tIm
  1. (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
    - terrestrial time, TT, terrestrial dynamical time, TDT

Type of: time unit, unit of time

Encyclopedia: Ephemeris time

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Ephedraceae
ephedrine
ephemera
ephemeral
ephemerality
ephemeralness
ephemerid
Ephemerida
Ephemeridae
ephemeris
ephemeris time
ephemeron
Ephemeroptera
ephemeropteran
Ephesian
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Ephestia
Ephestia elutella
Ephesus
ephialtes
Ephippidae