A chicken is a gallinaceous.
of an order (Galliformes) of birds that nest on the ground, including turkeys, chickens, pheasants, and grouse
Origin of gallinaceousClassical Latin gallinaceus ; from gallina, hen ; from gallus, a cock
Of, belonging to, or characteristic of the order Galliformes, which includes poultry, pheasants, and grouse.
Origin of gallinaceousFrom Latin gallīnāceus, of poultry, from gallīna, hen, feminine of gallus, cock; see gal- in Indo-European roots.
(comparative more gallinaceous, superlative most gallinaceous)