Ornith. [med.L. ūropygium (Diefenb.), ad. Gr. οὐροπύγιον. Cf. It. and Pg. uropigio.] The rump in birds.
1813. Bingley, Anim. Biog. (ed. 4), II. 235. The brilliant train of the Peacock … not growing from the uropygium (or rump,) but upon the back.
1835–6. Owen, in Todd’s Cycl. Anat., I. 349/1. A gland which is situated above the coccyx or uropygium.
1886. P. L. Sclater, Catal. Birds Brit. Mus., XI. 17. Cap, uropygium, and upper wing-coverts shining blue.
