arachnidism

noun
arach·​nid·​ism | \ -nə-ˌdiz-əm How to pronounce arachnidism (audio) \

Medical Definition of arachnidism

: poisoning caused by the bite or sting of an arachnid (as a spider, tick, or scorpion) especially : a syndrome marked by extreme pain and muscular rigidity due to the bite of a black widow spider

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