Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A drug, C19H21NO4, used in its hydrochloride form as an antagonist to narcotic drugs, such as morphine.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun 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.

  • noun a potent narcotic antagonist (trade name Narcan) especially effective with morphine

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[n(ormal) + al(lyl) + (hydr)ox(y) + (morphin)one, compound related to morphine.]

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Comments

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  • Wowee, I wasn't aware of the medical meaning of antagonist that WordNet uses.

    February 17, 2009