preen gland


Origin:
1920–25

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Encyclopedia Britannica
Encyclopedia

preen gland

in birds, an organ located on the back near the base of the tail. Paired or in two united halves, it is found in most birds. Absent in ostrich, emu, cassowary, bustard, frogmouth, and a few other birds, the oil gland is best-developed in aquatic species, notably petrels and pelicans, and in the osprey and oilbird.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Dippers have a relatively large uropygial gland or preen gland to maintain waterproof feathers.
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