n.
Pronunciation: ˌ f ī -s ə - ' stig- ˌ m ē n
Function: noun
Etymology: International Scientific Vocabulary, from New Latin Physostigma, genus of vines that bear the Calabar bean
Date: 1864
: a crystalline tasteless alkaloid C 15 H 21 N 3 O 2 from the Calabar bean that is used in medicine especially in the form of its salicylate for its anticholinesterase activity