Category:Uropygial

U`ro*pyg"i*al, a. Etym: [see uropygium.] (anat.)

Defn: of or pertaining to the uropygium, or prominence at the base of The tail feathers, in birds. Uropygial gland, a peculiar sebaceous Gland at the base of the tail feathers in most birds. It secretes an Oily fluid which is spread over the feathers by preening.