tt

Noun (2)tts

1. (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 motionsSynonyms: terrestrial timeterrestrial dynamical timeTDTephemeris timeType of time unit, unit of time
2. a country scattered over Micronesia with a constitutional government in free association with the United States; achieved independence in 1986Synonyms: MicronesiaFederated States of MicronesiaInstance of country, statePart of MicronesiaParts Kiribati, Nauru, Mariana Islands, Kolonia, Marshall Islands, Tuvalu, Caroline Islands, Gilbert and Ellice Islands