cris·sum (kr s  m)n. pl. cris·sa (kr s) The feathers or area under the tail of a bird surrounding the cloacal opening. [New Latin, from Latin cr  s re, crissre, to move the buttocks during intercourse; see sker-2 in Indo-European roots.]cris sal (-l) adj. |
crissum [ˈkrɪsəm]
n pl -sa [-sə]
(Life Sciences & Allied Applications / Zoology) the area or feathers surrounding the cloaca of a bird
[from New Latin, from Latin crissāre to move the haunches]
crissal adj
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