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1. Numbness; stupor; lethargy: narcolepsy.
2. Narcotic drug: narcoanalysis.
3. Illegal drugs: narcotrafficking.

[Greek narko-, from narkoun, to numb, from narkē, numbness.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


or sometimes before a vowel


combining form
1. indicating numbness or torpor: narcolepsy.
2. connected with or derived from illicit drug production: narcoeconomies.
[from Greek narkē numbness]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈnɑr koʊ)

n., pl. -cos. Slang.


a combining form meaning “stupor,” “narcosis” (narcolepsy), “illicit drugs” (narcoterrorism).
[< Greek nárk(ē) numbness, stiffness]
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