n.
Pronunciation: ' mo ̇ r- ˌ f ē n
Function: noun
Etymology: French, from Morpheus
Date: 1828
: a bitter crystalline addictive narcotic base C 17 H 19 NO 3 that is the principal alkaloid of opium and is used in the form of a soluble salt (as a hydrochloride or a sulfate) as an analgesic and sedative