SECOND (S)


Meaning of SECOND (S) in English

In the International System of Units (SI), the time interval equal to 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium-133 atom. ( 188 )

Telecommunication standard terms English vocab.      Английский словарь стандартных телекоммуникационных терминов.