[uro.py.gi.al gland] n (1870): a large gland that occurs in most birds, opens dorsally at the base of the tail feathers, and usu. secretes an oily fluid which the bird uses in preening its feathers--called also oil gland
UROPYGIAL GLAND
Meaning of UROPYGIAL GLAND in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012