psittaceous,a.Ornith.|psɪˈteɪʃəs| [f. L. psittac-us parrot (seeprec.) + -eous.] Of or belonging to the parrot family of birds, Psittacidæ. So psiˈttacean, ˈpsittacidadjs. (in mod. dicts.). 1835Kirby Hab. & Inst.Anim. I. ii. 71 The Psittaceous or Parrot tribes.