/ ˈmeθədəʊn; NAmE -doʊn/ noun
[ U ] a drug that is used to treat people who are trying to stop taking the illegal drug heroin
••
WORD ORIGIN
1940s: from its chemical name, (6-di)meth(yl)a(mino-4,4-)d(iphenyl-3-heptan)one .
/ ˈmeθədəʊn; NAmE -doʊn/ noun
[ U ] a drug that is used to treat people who are trying to stop taking the illegal drug heroin
••
WORD ORIGIN
1940s: from its chemical name, (6-di)meth(yl)a(mino-4,4-)d(iphenyl-3-heptan)one .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005