Uropygium

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Uropygium \U`ro*pyg"i*um\, n. [NL., fr. Gr. ?, (corrupted form)
     ?; ? the end of the os sacrum + ? rump.] (Anat.)
     The prominence at the posterior extremity of a bird's body,
     which supports the feathers of the tail; the rump; --
     sometimes called pope's nose.
     [1913 Webster]



From WordNet (r) 2.0 [wn]:

  uropygium
       n : posterior part of a bird's body from which the tail feathers
           grow