uropygium

uropygium Definition

uro·pyg·ium (yo̵or′ə pij′ē əm)

noun pl. uropygia -·ia (-ē ə) or uropygiums -·iums

the hump at the rear extremity of a bird's body, from which the tail feathers grow

Etymology: ModL < Gr ouropygion, altered (infl. by oura, tail: see uro-) < orrhopygion < orrhos, end of the os sacrum + pygē, rump

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