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half life ['hɑːflaɪf]
chem.	півперіод m
environ.	напіврозпад; період піврозпаду
half-life ['hɑ:flaɪf]
environ.	період напіврозпаду
phys.	піврозпад; період піврозпаду
English thesaurus
half-life ['hɑ:flaɪf]
abbr., med.	T 1/2
metrol.	The time span necessary for the atoms of a nuclide to disintegrate by one half
USA	The time required for the activity of a given radioactive species to decrease to half of its initial value due to radioactive decay (JP 3-11)
Half-Life ['hɑ:flaɪf]
med.	The time it takes a drug to lose half its original concentration or activity after being introduced into the body. Drug half-life is considered when determining drug dosing.

half life: 13 phrases in 7 subjects

Chemistry	4
Ecology	1
Energy industry	2
General	3
Military	1
Natural sciences	1
Pharmacy and pharmacology	1