'Uropygial' definitions:
Definition of 'Uropygial'
From: GCIDE
- Uropygial \U`ro*pyg"i*al\, a. [See Uropygium.] (Anat.) Of or pertaining to the uropygium, or prominence at the base of the tail feathers, in birds. [1913 Webster]
- 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. [1913 Webster]