Ornith.
a gland opening on the back at the base of the tail in most birds that secretes an oily fluid used by the bird in preening its feathers. Also called oil gland, preen gland .
[ 1865-70 ]
Ornith.
a gland opening on the back at the base of the tail in most birds that secretes an oily fluid used by the bird in preening its feathers. Also called oil gland, preen gland .
[ 1865-70 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012