crissum

[ kris-uh m ]
/ ˈkrɪs əm /
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noun, 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.

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. 2019

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British Dictionary definitions for crissum

crissum

/ (ˈkrɪsəm) /

noun plural -sa (-sə)

the area or feathers surrounding the cloaca of a bird
Derived Formscrissal, adjective

Word Origin for crissum

C19: from New Latin, from Latin crissāre to move the haunches
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012