n.
Pronunciation: ' her- ə -w ə n, ' he-r ə -
Function: noun
Etymology: from Heroin, a trademark
Date: 1898
: a strongly physiologically addictive narcotic C 21 H 23 NO 5 that is made by acetylation of but is more potent than morphine and that is prohibited for medical use in the U.S. but is used illicitly for its euphoric effects
– her · o · in · ism \ -w ə - ˌ ni-z ə m \ noun