noun
also her·oine ˈhe]rəwə̇n sometimes ˈhi] or ]ˌrȯin\
( -s )
Etymology: from Heroin, a trademark
: a bitter white crystalline narcotic C 21 H 23 NO 5 made from morphine but more potent than morphine and because of its addictive properties prohibited by law from being manufactured in or imported into the United States and many other countries — called also diacetylmorphine, diamorphine