- 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.
Also meth·a·don [meth-uh-don] /ˈmɛθ əˌdɒn/.
Origin of methadone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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
Word Origin and History for methadon
Online Etymology Dictionary, © 2010 Douglas Harper
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.