meth·a·done

[meth-uh-dohn]
noun Pharmacology.
a synthetic narcotic, C 2 1 H 2 8 ClNO, similar to morphine but effective orally, used in the relief of pain and as a heroin substitute in the treatment of heroin addiction.
Also, meth·a·don [meth-uh-don] .


Origin:
1945–50, Americanism; meth(yl) + a(mino) + d(iphenyl) + (heptan)one

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
methadone or methadon (ˈmɛθəˌdəʊn, ˈmɛθəˌdɒn) [Click for IPA pronunciation guide]
 
n
a narcotic analgesic drug similar to morphine, used to treat opiate addiction. Formula: C21H27NO
 
[C20: from (di)meth(yl) + a(mino) + d(iphenyl) + -one]
 
methadon or methadon
 
n
 
[C20: from (di)meth(yl) + a(mino) + d(iphenyl) + -one]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Methadone is always a great word to know.
So is zedonk. Does it mean:
the offspring of a zebra and a donkey.
a stew of meat, vegetables, potatoes, etc.
Etymonline
Word Origin & History

methadone
1947, generic designation for 6-dimethylamino-4, 4-diphenyl-3-heptanone.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary
methadone [(meth-uh-dohn)]

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

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Misuse of diverted methadone at high doses and/or by individuals who had little
  or no tolerance to the drug.
It showed the presences of both methadone and diazepam.
One aim is to determine whether heroin maintenance is more effective than
  methadone in helping break addiction.
Studies of the long-term administration of methadone confirm that it is a
  medically safe drug.
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