Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
tt is a noun meaning "(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". It carries 3 recorded senses.
(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
astronomy
a republic in the western central Pacific Ocean in association with the United States
a country scattered over Micronesia with a constitutional government in free association with the United States; achieved independence in 1986
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for tt come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.