'TDT' definitions:
Definition of 'TDT'
(from WordNet)
noun
(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 [syn: terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris time]
Acronyms for 'tdt'
From: V.E.R.A.
- Time and Date Table (DVB, UTC)