rascasse Syllabification: (ras·casse)Pronunciation: /rasˈkas/Definition of rascasse noun a small scorpionfish with brick-red skin and spiny fins, found chiefly in the Mediterranean and used as an ingredient of bouillabaisse. Scorpaena scrofa, family Scorpaenidae Origin: 1920s: from Frenchrascasse in other Oxford dictionaries Definition of rascasse in the British & World English dictionary