/fuy'soh stig"meen, -min/ , n. Pharm.
an alkaloid, C 15 H 21 N 3 O 2 , used in the treatment of Alzheimer's disease to raise the level of the neurotransmitter acetylcholine and also as a miotic in glaucoma.
[ 1860-65; Physostigm ( a ) genus of plants yielding the alkaloid (see PHYSO-, STIGMA) + -INE 2 ]