Last Updated
：2025/11/21
radioactive decay
Noun
countable
uncountable
Japanese Meaning
（物理学）不安定な原子核が亜原子粒子や電離放射線を放出し、一つ以上のより小さな原子核に変わる現象
（ plural ）
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(physics) Any of several processes by which unstable nuclei emit subatomic particles and/or ionizing radiation and disintegrate into one or more smaller nuclei.
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radioactive decay
Scientists measured the rate of radioactive decay to estimate the age of the meteorite.
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Scientists measured the rate of radioactive decay to estimate the age of the meteorite.
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