transcription, транскрипция: [ -ˌlīf ]
noun
Date: 1907
1. : the time required for half of something to undergo a process: as
a. : the time required for half of the atoms of a radioactive substance to become disintegrated
b. : the time required for half the amount of a substance (as a drug, radioactive tracer, or pesticide) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes
2. : a period of usefulness or popularity preceding decline or obsolescence
slang usually has a short half-life