uropygium

uropygium

[yoor-uh-pij-ee-uhm]
noun Ornithology.
the projecting terminal portion of a bird's body, from which the tail feathers spring.

Origin:
1805–15; < Neo-Latin < Greek ouropȳ́gion, variant (with ouro- uro-2) of orropȳ́gion, equivalent to orro-, combining form of órros sacral bone + pȳg() rump, buttocks + -ion diminutive suffix

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World English Dictionary
uropygium (ˌjʊərəˈpɪdʒɪəm)
 
n
the hindmost part of a bird's body, from which the tail feathers grow
 
[C19: via New Latin from Greek ouropugion, from uro-² + pugē rump]
 
uro'pygial
 
adj

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