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half-life

['hɑ:flaɪf]
gen. 半寿命; 半衰〔减，寿〕期; 半衰变周期
auto. 半衰减使用，衰变周期
interntl.trade. ★ 半衰期; 半减期
life.sc. 半存留期
med. 半期存留期
met. 半衰期 (period)
nucl.phys. 半衰期 (τ)
space 半排出期
sport., med. 半寿期
tech. 放射性元素量半衰期; 声能半衰期
half life ['hɑːflaɪf]
agric. 半衰期指同位素
anim.husb. 半衰期同位素最初所具有的放射性通过衰变减少一半所需时间，或药品自服用后至剂量的一半排出体外的时间,均称半衰期; 半存留期
nucl.phys. 半衰期 (period)
physiol. 半衰期
securit. 一半期限; 债券半偿期
tech. 半减期; 半寿期; 半寿命; 半反应期
half-life The time required for one-half the atoms of a given amount of radioactive material to undergo radioactive decay ['hɑ:flaɪf]
environ. 半衰期 (定量的辐射性物质，其原子之数量经由辐射衰退为原来的一半所需的时间。)
 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
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