predaciousPronunciation: /prɪˈdeɪʃəs/ (also predaceous)Definition of predacious adjective (of an animal) predatory:predacious insectsDerivatives predaciousness noun predacityPronunciation: /-ˈdasɪti/ noun Origin: early 18th century: from Latin praeda 'booty' + -aciouspredacious in other Oxford dictionaries Definition of predacious in the US English dictionary