from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A drug, C19H21NO4, used as an antagonist to narcotic drugs, such as morphine.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A drug used to counter the effects of an overdose on opioids (such as heroin or morphine).
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a potent narcotic antagonist (trade name Narcan) especially effective with morphine
Short for N-allyldihydrohydroxynormorphinone, its chemical name.(American Heritage® Dictionary of the English Language, Fourth Edition)