uropygium


uro·py·gi·um

noun \ˌyr-ə-ˈpī-jē-əm\

Definition of UROPYGIUM

:  the fleshy and bony prominence at the posterior extremity of a bird's body that supports the tail feathers

Origin of UROPYGIUM

New Latin, from Greek ouropygion, from ouro- 2ur- + pygē rump
First Known Use: 1771

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