crissum
/kris-uhm/US // ˈkrɪs əm //UK // (ˈkrɪsəm) //
酥饼,酥麻,酥皮纸,剪刀
Definitions
n.名词 noun
- 1
plural cris·sa [kris-uh]. /ˈkrɪs ə/. Ornithology.
- : the region surrounding the cloacal opening beneath the tail of a bird.
- : the feathers of this region collectively.
Examples
Female olive-brown, paler below, chin pale ochraceous; middle of belly and crissum white; bill brown, feet yellowish.
Female: above grey, densely striated with black; beneath dirty white, with dense black striations, belly and crissum fulvous.
Below, bright lemon-yellow, the crissum white or merely tinged with yellow.
Below grayish buff rapidly fading when older to a greenish gray; abdomen and crissum pale straw-yellow.
Below, olive-yellow darker on the flanks, the abdomen and crissum white.
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