uropygium

/yoor-uh-pij-ee-uhm/US // ˌyʊər əˈpɪdʒ i əm //UK // (ˌjʊərəˈpɪdʒɪəm) //

乌洛比盖姆

Definitions

n.名词 noun

1
Ornithology.
- : the projecting terminal portion of a bird's body, from which the tail feathers spring.

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.
Uropygium: the ovipositor when it is a mere extension of the abdominal segments.
Seaside Sparrows have a mid-dorsal row of downs in the dorsal tract near the uropygium.
In some of the families the uropygium is recorded as small in suspiciously close to 25 per cent of the offspring.