a highly addictive analgesic drug derived from morphine, often used illicitly as a narcotic producing euphoria.
A white crystalline compound, odorless and bitter, C 21 H 23 NO 5 , which is derived from morphine and is a highly addictive illegal narcotic. Also called diacetylmorphine .
[German, originally a trademark <
( hɛrəʊɪn )
1. (Pharmacology) a white crystalline powder with an odorless bitter taste related to morphine: a highly addictive narcotic. Formula: C21H23NO5. Technical names: diamorphine or diacetylmorphine
2. (Recreational drugs), a crystalline powder with a bitter, white and odorless flavor, related to morphine: a highly addictive narcotic. Formula: C21H23NO5. Technical names: diamorphine or diacetylmorphine
[C19: coined in German as
(ˈhɛr oʊ ɪn)
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(hɛr oʊ ɪn) n n n.
a white crystalline powder, C 21 H 23 NO 5 , derived from the morphine, that is narcotic and addictive: manufacture or importation is prohibited in the United States and other nations.