adjective Date: 1900 marked either by entire or complete operation or effect or by none at all <
all-or-none response of a nerve cell

New Collegiate Dictionary. 2001.

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  • all-or-none law — /awl euhr nun /, Physiol. 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. [1895 1900] * * * ▪… …   Universalium

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  • None — (n[u^]n), a. & pron. [OE. none, non, nan, no, na, AS. n[=a]n, fr. ne not + [=a]n one. [root]193. See {No}, a. & adv., {One}, and cf. {Non }, {Null}, a.] [1913 Webster] 1. No one; not one; not anything; frequently used also partitively, or as a… …   The Collaborative International Dictionary of English

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