The condition produced by the bite of a venomous spider; spider envenomation. ... (12 Dec 1998) ... 
(ә-rak´nĭ-diz-әm) poisoning from the bite of a spider.
Type: Term Pronunciation: ă-rak′ni-dizm Definitions: 1. Systemic poisoning following the bite of a spider (especially the black widow).
arachnidism A morbid condition resulting from the bite of an arachnid, that may include ascending motor paralysis and destruction of peripheral nerve endings. Also called spider poisoning, arachnoidism, and araneism..