Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of or pertaining to the uropygium; on the rump.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of or pertaining to the uropygium, or prominence at the base of the tail feathers, in birds.

from The Century Dictionary and Cyclopedia

  • In ornithology, of or pertaining to the uropygium or rump: as, uropygial feathers.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From uropygium.

Examples

  • Penguins have a special gland, called a uropygial gland, near the base of their stubby tails on the topside of their rumps, from which they get a light waxy substance that has the consistency of baby oil.

    The Great Penguin Rescue

  • Their research is the first to demonstrate that birds transfer the colour pigments (carotenoids) from the secretions of their uropygial gland for cosmetic reasons.

    Flamingos Apply Natural Make-Up To Their Feathers To Attract Mates: Study

  • Penguins have waterproof coats that need to be constantly maintainedthrough preening, when they use their bill to apply an oily substance secreted from the uropygial gland, atthe base of the tail.

    Black-footed penguin

  • The politically (and anatomically) correct term is pygostyle -- literally rump post -- for the structure of fused vertebra that anchors the turkey's magnificent tail feathers (rectrices) and also harbors the uropygial gland, source of preen oil, the yummy fat the bird uses to groom its plumage.

    Cold Turkey

  • Our results also suggest that a preened body surface could be the common denominator that explains how AIV infection occurs in different taxonomic groups of aquatic birds and future studies are needed to determine the common uropygial component that could promote interaction with AIVs in all aquatic bird species.

    Daily News & Analysis

  • Feathers remain waterproof by constant preening during which an oily substance (also containing wax), produced by the uropygial gland at the base of the tail, is applied to the feathers.

    Featured Articles - Encyclopedia of Earth

  • Feathers remain waterproof by constant preening during which an oily secretion containing a waxy substance, produced by a gland from the base of the tail (the uropygial gland), is applied over the feathers.

    Featured Articles - Encyclopedia of Earth

  • The scientists used gas chromatography-mass spectrometry to isolate 19 volatile compounds from the preen oils which are secreted from the birds 'uropygial glands near the base of the tail.

    Gaea Times (by Simple Thoughts) Breaking News and incisive views 24/7

  • Balthazart J, Schoffeniels E (1979) Sex differences in the chemical composition of uropygial gland waxes in domestic ducks.

    PLoS ONE Alerts: New Articles

  • They have hollow bones and they are equipped with uropygial glands that allow them to put waterproof oil on their feathers.

    The Albert Lea Tribune

Comments

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  • pertaining to bird rumps.

    July 23, 2008