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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
From the M-W Editors
First Known Use of uropygial gland
1870
Learn More about uropygial gland
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Britannica.com: Encyclopedia article about uropygial gland
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