heroin: Meaning and Definition of
Pronunciation: (her'ō-in), [key]
— n. Pharm.
- a white, crystalline, narcotic powder, CHNO, 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
- heroin (Thesaurus)