[yoo r-uh-pij-ee-uh m]
- the projecting terminal portion of a bird's body, from which the tail feathers spring.
Origin of uropygium
1805–15; < New Latin < Greek ouropȳ́gion, variant (with ouro- uro-2) of orropȳ́gion, equivalent to orro-, combining form of órros sacral bone + pȳg(ḗ) rump, buttocks + -ion diminutive suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for uropygium
In some of the families the uropygium is recorded as small in suspiciously close to 25 per cent of the offspring.Inheritance of Characteristics in Domestic Fowl
Charles Benedict Davenport
Seaside Sparrows have a mid-dorsal row of downs in the dorsal tract near the uropygium.Comparative Breeding Behavior of Ammospiza caudacuta and A. maritima
Glen E. Woolfenden
The uropygium also, which in the European bird is entirely white, is in our specimen partially variegated with black.
The tail length, however, is measured from the base of the uropygium to the tip of the longest pair of rectrices.The Subspecies of the Mountain Chickadee
Uropygium: the ovipositor when it is a mere extension of the abdominal segments.Explanation of Terms Used in Entomology
John. B. Smith
- 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