American Heritage® Dictionary of the English Language, Fourth Edition
- n. The posterior part of a bird's body, from which the tail feathers grow.
Century Dictionary and Cyclopedia
- n. In ornithology, the rump; the terminal section of the body, represented by the caudal vertebræ, into which the tail-feathers are inserted; also, the upper surface of this part, or terminal section of the notæum, with limits not defined. See cuts under bird and elæodochon.
GNU Webster's 1913
- n. (Anat.) The prominence at the posterior extremity of a bird's body, which supports the feathers of the tail; the rump; -- sometimes called
- n. posterior part of a bird's body from which the tail feathers grow
- Mediaeval Latin, from Ancient Greek οὐροπύγιον (ouropugion, "tail feathers"). (Wiktionary)
- New Latin ūropygium, from Greek ouropugion : ouro-, tail; see uro-2 + pugē, rump. (American Heritage® Dictionary of the English Language, Fourth Edition)
“A range of short brown stiff feathers, about six inches long, fixed in the _uropygium_, is the real tail, and serves as the fulcrum to prop the train, which is long and top-heavy, when set on end.”
“The crown of the head, the throat, the ear-coverts, and the eyes have usually distinct tints in all highly coloured birds; the region of the furcula has often a distinct patch of colour, as have the pectoral muscles, the uropygium or root of the tail, and the under tail-coverts. [”
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Looking for tweets for uropygium.