Definition of phlegmagogue in US English:

phlegmagogue

noun

historical
  • A medicine for expelling phlegm; an expectorant.

Origin

Late Middle English; earliest use found in Guy de Chauliac's Grande Chirurgie. From Middle French fleumagogue, French † phlegmagogue, † flegmagogue and its etymon post-classical Latin phlegmagogum, use as noun of phlegmagogus carrying off phlegm from Hellenistic Greek ϕλεγμαγωγός from ancient Greek ϕλέγμα + ἀγωγός drawing forth.

Pronunciation

phlegmagogue

/ˈflɛ(ɡ)məɡɒɡ/