rasvarauhanen

Noun

 * 1)  uropygial gland secretory organ, at the base of a bird's tail, that secretes the oil used in preening
 * 2)  grease gland gland located at the end of guinea pig's spine, that secretes a thick, oily substance with which the animals mark their territory
 * 1)  grease gland gland located at the end of guinea pig's spine, that secretes a thick, oily substance with which the animals mark their territory