Word.ws English Dictionary

methadone

/ˈmɛθ.əd.əʊn/US/ˈmɛθ.əˌdoʊn/

methadone noun: a powerful synthetic analgesic drug which is similar to morphine in its effects but less sedative and is used as a substitute drug in the treatment of morphine and heroin addiction.

methadone: a powerful synthetic analgesic drug which is similar to morphine in its effects but less sedative...
Image: Calvero, Public domain, via Wikimedia Commons

Noun

methadone (countable and uncountable, plural methadones)

  1. A powerful synthetic analgesic drug which is similar to morphine in its effects but less sedative and is used as a substitute drug in the treatment of morphine and heroin addiction.
    • But methadone is a dangerous drug. If taken orally by a nonaddict, it can cause euphoria or even death.1971 March 19, Richard Severo, “Addiction: Chemistry Is the New Hope, but Degree of Its Effectiveness Is Still Disputed”, in The New York Times
    Synonyms:
    amidone

Synonyms of methadone

Forms of methadone

pluralmethadones

Origin of methadone

From (di)meth(yl)a(mino) + d(iphenyl) + (heptan)one.

Words formed from methadone

Questions about methadone

What does methadone mean?
Methadone means a powerful synthetic analgesic drug which is similar to morphine in its effects but less sedative and is used as a substitute drug in the treatment of morphine and heroin addiction.
What part of speech is methadone?
Methadone is a noun.
How do you pronounce methadone?
Methadone is pronounced /ˈmɛθ.əd.əʊn/ (UK).
What is the plural of methadone?
The plural of methadone is methadones.

Words near methadone in the dictionary

  1. methacrylic acid
  2. methacryloyl
  3. methacryloyls
  4. methacycline
  5. methadon
  6. methadone
  7. methadones
  8. methadons
  9. methaemalbumin
  10. methaemalbuminaemia
  11. methaemoglobin

Source and license

Adapted from Wiktionary: methadone (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-methadone.wav.

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