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. (.
- synonyms: terrestrial time, TT, terrestrial dynamical time, ephemeris time
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). tdt. Retrieved September 21, 2026, from http://smartdefine.org/tdt/definitions/1315302 |
| Chicago | WordNet. 2010. "tdt" http://smartdefine.org/tdt/definitions/1315302 (accessed September 21, 2026). |
| Harvard | WordNet 2010, tdt, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/tdt/definitions/1315302>. |
| MLA | WordNet. "tdt" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/tdt/definitions/1315302> |