international atomic time
noun
a system of measuring time based on atomic clocks that measure the second as the basic unit of time in the International System of Units(SI). Abbreviation: IAT
Words nearby international atomic time
British Dictionary definitions for international atomic time
International Atomic Time
noun
the scientific standard of time based on the SI unit, the second, used by means of atomic clocks and satellites to synchronize the time standards of the major nations
Abbreviation: TAI