Definition of fen-phen in English:

fen-phen

Syllabification: fen-phen
Pronunciation: /ˈfenfen/

Entry from US English dictionary

noun

A combination of the appetite-suppressant drugs fenfluramine and phentermine not used since the withdrawal of fenfluramine from the US market in 1997.

Definition of fen-phen in:

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Word of the day ween
Pronunciation: wiːn
verb
be of the opinion; think or suppose