| 单词 | uropygium |
| 释义 | uropygium /ū-rō-pijˈi-əm/noun(in birds) the rump, which supports the tail feathers ORIGIN: Gr ouropȳgion or orropȳgion, from orros the end of the sacrum, and pȳgē buttocks uropygˈial adjective uropygial gland noun A gland at the base of the tail in most birds, which secretes oil used in preening |
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