a colorless or pinkish crystalline alkaloid, CHNO, extracted from the Calabar bean, used in medicine for stimulating intestinal muscles, contracting the pupils of the eyes, etc.
Origin of physostigminefrom Modern Latin Physostigma, name of the genus including the Calabar bean from Classical Greek physa, a bellows ( from Indo-European an unverified form phus-, variant, variety of an unverified form pu-, an unverified form phu-, to blow from source Classical Latin pustula) + stigma, a prick (see stick) + -ine
A crystalline alkaloid, C15H21N3O2, extracted from the Calabar bean, used in the form of its sulfate as a miotic and in the form of its salicylate as a cholinergic agent. Also called eserine .
Origin of physostigmineNew Latin Phésostigma genus name of the Calabar bean (Greek phūsa bladder, from the appendage at the end of the stigma that was formerly thought to be hollow ) ( stigma ) -ine 2