uropygial gland

noun
uro·​py·​gi·​al gland | \ ˌyu̇r-ə-ˈpī-jē-əl- How to pronounce uropygial gland (audio) \

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, in the meaning defined above

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The first known use of uropygial gland was in 1870

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Britannica.com: Encyclopedia article about uropygial gland

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