Meanings
Synonyms & antonyms
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
Broader
Synonym sets from Open English WordNet, CC BY 4.0.
Cite this entry
APA
TdT. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/TdT
MLA
“TdT.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/TdT. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “TdT,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/TdT.
Source: TdT on Wiktionary, CC BY-SA 4.0.