uropygium

u·ro·py·gi·um  (yr-pj-m, -pj-)

n.

The posterior part of a bird's body, from which the tail feathers grow.

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[New Latin ropygium, from Greek ouropugion : ouro-, tail; see uro-² + pug, rump.]

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uro·pygi·al (-l) adj.

Thesaurus

Noun

1.

uropygium - posterior part of a bird's body from which the tail feathers grow bird - warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings tail - the posterior part of the body of a vertebrate especially when elongated and extending beyond the trunk or main part of the body