uropygial gland


uro·py·gi·al gland

noun \ˌyr-ə-ˈpī-jē-əl-\

Definition of UROPYGIAL GLAND

:  a large gland that occurs in most birds, opens dorsally at the base of the tail feathers, and usually secretes an oily fluid which the bird uses in preening its feathers —called also oil gland

First Known Use of UROPYGIAL GLAND

1870

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