Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun half_life

1 sense of half life

Sense 1
half life, half-life -- (the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate))
       => time period, period of time, period -- (an amount of time; "a time period of 30 years"; "hastened the period of time of his recovery"; "Picasso's blue period")