Source : Webster's Revised Unabridged Dictionary (1913)

Gallinaceous \Gal`li*na"ceous\, a.[L. gallinaceus, fr. gallina
   hen, fr. gallus cock.] (Zo["o]l.)
   Resembling the domestic fowls and pheasants; of or pertaining
   to the Gallinae.

Source : WordNet®

gallinaceous
     adj 1: of or relating to a gallinacean
     2: relating to or resembling fowl