The Collaborative International Dictionary of English v.0.48:
Psittaceous \Psit*ta"ceous\, Psittacid \Psit"ta*cid\, a. [L.
psittacus a parrot, Gr. ?: cf. F. psittacide.] (Zool.)
Of or pertaining to the parrots, or the Psittaci. -- n. One
of the Psittaci.
[1913 Webster]