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单词 uropygial gland
释义

WordReference Random House Unabridged Dictionary of American English © 2024
uropygial gland′, [Ornith.]
  1. Birdsa gland opening on the back at the base of the tail in most birds that secretes an oily fluid used by the bird in preening its feathers. Also called oil gland, preen gland. 
  • 1865–70

Collins Concise English Dictionary © HarperCollins Publishers::
uropygial gland n
  1. a gland, situated at the base of the tail in most birds, that secretes oil used in preening
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