- the region surrounding the cloacal opening beneath the tail of a bird.
- the feathers of this region collectively.
Origin of crissum
1870–75; < New Latin, equivalent to Latin criss(āre) to move the haunches + -um noun suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for crissum
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.
Below, greenish buff paler and yellower on abdomen and crissum.
Below, pale yellowish wood-brown, straw-yellow on abdomen and crissum.
- the area or feathers surrounding the cloaca of a bird
C19: from New Latin, from Latin crissāre to move the haunches