1. A republic in the western central Pacific Ocean in association with the United States
   - Palau, Republic of Palau
    
2. (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
   "Astronomers use TT for precise orbital calculations";
   - terrestrial time, terrestrial dynamical time, TDT, ephemeris time
    
3. A country scattered over Micronesia with a constitutional government in free association with the United States; achieved independence in 1986
   - Micronesia, Federated States of Micronesia

Derived forms: TTs

Type of: country, land, state, time unit, unit of time

Part of: Belau, Micronesia, Palau, Palau Islands, Pelew

Encyclopedia: TT