The Collaborative International Dictionary of English v.0.48:
Gallinaceous \Gal`li*na"ceous\, a.[L. gallinaceus, fr. gallina hen, fr. gallus cock.] (Zool.) Resembling the domestic fowls and pheasants; of or pertaining to the Gallinae. [1913 Webster]WordNet (r) 3.0 (2006):
gallinaceous adj 1: of or relating to or resembling a gallinacean