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tt

 
Noun tt has 3 senses
  1. terrestrial time, TT, terrestrial dynamical time, TDT, ephemeris time - (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
    --1 is a kind of time unit, unit of time
  2. Palau, Republic of Palau, TT - a republic in the western central Pacific Ocean in association with the United States
    --2 is a kind of country, state, land
    --2 is a part of Palau, Palau Islands, Belau, Pelew
  3. Micronesia, Federated States of Micronesia, TT - a country scattered over Micronesia with a constitutional government in free association with the United States; achieved independence in 1986
    --3 is a kind of country, state, land
    --3 is a part of Micronesia
    --3 has parts:
     Kolonia; Mariana Islands, Marianas, Ladrone Islands; Caroline Islands; Marshall Islands; Tuvalu, Ellice Islands; Kiribati, Republic of Kiribati; Gilbert and Ellice Islands; Nauru, Nauru Island, Pleasant Island
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