Pronunciation: (her'ō-in), [key]
n. Pharm.
a white, crystalline, narcotic powder, C21H23NO5, derived from morphine, formerly used as an analgesic and sedative: manufacture and importation of heroin are now controlled by federal law in the U.S. because of the danger of addiction. Also called diacetylmorphine, diamorphine.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

heroic verseheroine
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