† preˈdaceanObs.rare. [f.predace-ous, erron. form of predacious + -an (after crustacean, etc.).] A predacious animal; a bird or beast of prey. 1835Kirby Hab. & Inst.Anim. II. xxiv. 481 The Predaceaus and several others, when first born are blind.1895Syd. Soc.Lex., Predacean, a syn. for Carnivore.