[yoo
r-uh-pij-ee-uhm] 
| the projecting terminal portion of a bird's body, from which the tail feathers spring. |
) rump, buttocks + -ion dim. suffix| u·ro·py·gi·um (yŏŏr'ə-pī'jē-əm, -pĭj'ē-) n. The posterior part of a bird's body, from which the tail feathers grow. [New Latin ūropygium, from Greek ouropugion : ouro-, tail; see uro-2 + pugē, rump.] u'ro·py'gi·al (-əl) adj. |