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WordReference Random House Unabridged Dictionary of American English © 2024weak′ interac′tion, [Physics.]- Physicsthe interaction between elementary particles and the intermediate vector bosons that carry the weak force from one particle to another.
Collins Concise English Dictionary © HarperCollins Publishers:: weak interaction, weak force n - an interaction between elementary particles that is responsible for certain decay processes, operates at distances less than about 10–15 metres, and is 1012 times weaker than the strong interaction. The weak interaction and electromagnetic interactions are now described by the unifying electroweak theory
Also called: weak nuclear interaction, weak nuclear force
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