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all-or-none law

[ awl-er-nuhn ]

noun

, Physiology.
  1. the principle that under given conditions the response of a nerve or muscle fiber to a stimulus at any strength above the threshold is the same: the muscle or nerve responds completely or not at all.


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Word History and Origins

Origin of all-or-none law1

First recorded in 1895–1900

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all-or-noneall-or-nothing