Uberon definition : A large gland at the base of a bird's tail dorsal to the cloaca at the end of the
pygostyle that secretes an oil used in preening. It opens through a caudally directed
nipple.;
Uberon related term : preen gland; preen oil gland; oil gland;
A large gland at the base of a bird's tail dorsal to the cloaca at the end of the
pygostyle that secretes an oil used in preening. It opens through a caudally directed
nipple.