Last Updated
：2025/11/20
critical mass
Noun
countable
uncountable
figuratively
Japanese Meaning
（物理学）自己持続的な核連鎖反応を維持するために必要な臨界質量、すなわち核分裂性物質の最小量 / （比喩的）転換点、または大きな変革を起こすための最小限のまとまった要素や人数
（ plural ）
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(physics) The amount of fissile material needed to support a self-sustaining nuclear chain reaction. / (figuratively) The tipping point.
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critical mass
The laboratory carefully measured the critical mass of the plutonium sample before proceeding with the experiment.
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The laboratory carefully measured the critical mass of the plutonium sample before proceeding with the experiment.
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