A chicken is a gallinaceous.
gallinaceous definition by Webster's New World
Origin: Classical Latin gallinaceus ; from gallina, hen ; from gallus, a cock
gallinaceous definition by American Heritage Dictionary
- Of, belonging to, or characteristic of the order Galliformes, which includes the common domestic fowl as well as the pheasants, turkeys, and grouse.
- Relating to or resembling the domestic fowl.
Origin: From Latin gallīnāceus, of poultry, from gallīna, hen, feminine of gallus, cock; see gal- in Indo-European roots.
- galˌli·naˈcean noun