[ meth-uh-dohn ]
/ ˈmɛθ əˌdoʊn /
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noun Pharmacology.

a synthetic narcotic, C21H28ClNO, similar to morphine but effective orally, used in the relief of pain and as a heroin substitute in the treatment of heroin addiction.



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Also meth·a·don [meth-uh-don]. /ˈmɛθ əˌdɒn/.

Origin of methadone

An Americanism dating back to 1945–50; meth(yl) + a(mino) + d(iphenyl) + (heptan)one
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for methadone


methadon (ˈmɛθəˌdɒn)

/ (ˈmɛθəˌdəʊn) /


a narcotic analgesic drug similar to morphine, used to treat opiate addiction. Formula: C 21 H 27 NO
C20: from (di) meth (yl) + a (mino) + d (iphenyl) + -one
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Cultural definitions for methadone

[ (meth-uh-dohn) ]

An analgesic that is sometimes used in the treatment of drug addiction.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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