Noun: uropygium ,yû-ru'pi-jee-um or ,yû-ru'pI-jee-um- Posterior part of a bird's body from which the tail feathers grow
"The uropygium contains the preen gland, which produces oil for feather maintenance"
Derived forms: uropygiums
Type of: tail
Part of: bird, birdie [informal]
Encyclopedia: Uropygium