ˌ ̷ ̷ ̷ ̷ˈstigˌmēn, -_mə̇n noun
( -s )
Etymology: International Scientific Vocabulary physostigm- (from New Latin Physostigma ) + -ine; originally formed as German physostigmin
: a crystalline tasteless tricyclic alkaloid C 15 H 21 N 3 O 2 that is the chief alkaloid of the Calabar bean and is used in medicine especially in the form of its salicylate as a myotic; eseroline methyl-carbamate — called also eserine