gallinaceousEnglishOxford Dictionary of Englishgallinaceous /ˌɡalɪˈneɪʃəs / ▸ adjective dated relating to birds of an order (Galliformes) which includes domestic poultry and game birds. – ORIGIN late 18th century: from Latin gallinaceus (from gallina ‘hen’, from gallus ‘cock’) + -ous.