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(astronomy) a measure of time defined by Earth's orbital motion
Answer for the clue "(astronomy) a measure of time defined by Earth's orbital motion ", 3 letters:
tdt
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Wikipedia
Word definitions in Wikipedia
TDT may refer to: TDT is in various languages ( Spanish , Portuguese , Italian , Catalan and Galician ) for Digital terrestrial television . TDT (TV station) , a digital television station in Tasmania, Australia TDT (Portugal) , digital terrestrial television ...