Last Updated
：2026/01/04
半減期
Hiragana
はんげんき
Noun
Japanese Meaning
放射性物質が崩壊して、その量が元の半分になるまでに要する時間、またはある現象や効果が統計的に半分に減少するまでにかかる時間を示す指標。
Easy Japanese Meaning
へっていくもののりょうがはんぶんになるまでにかかるじかん
Chinese (Simplified) Meaning
物质（尤指放射性核素）数量衰减至一半所需的时间 / 药物在体内浓度或效应降低至一半所需的时间
Chinese (Traditional) Meaning
物質（如放射性核素）數量降至一半所需的時間 / 藥物在體內濃度降至一半所需的時間 / 某量從初始值減至一半的時間
Korean Meaning
방사성 물질이나 핵종의 양이 절반으로 줄어드는 데 걸리는 시간 / 약물 농도가 초기의 50%로 감소하는 데 필요한 시간 / 일반적으로 어떤 양이 절반으로 감소하는 데 걸리는 기간
Vietnamese Meaning
chu kỳ bán rã / thời gian bán hủy (dược/y học) / thời gian để lượng hoặc hoạt độ của chất giảm còn một nửa
Tagalog Meaning
kalahating-buhay / panahon para bumaba sa kalahati ang dami (hal. radyoaktibidad o konsentrasyon ng gamot) / oras ng pagkalahati
Sense（1）
(physics, chemistry, medicine) a half-life
（ canonical ）
（ romanization ）
（ hiragana ）
Quizzes for review
See correct answer
半減期
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What is the half-life of this substance?
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この物質の半減期はどのくらいですか？
Japanese - English
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