crissum (plural crissa)
The area of feathers on a bird that surround its cloaca.
Source: Wiktionary
Cris"sum (krs"sm),, n.; pl. Crissa (-s. Etym: [NL.; cf. L. crisso to move the haunches.] (Zoöl.)
Definition: That part of a bird, or the feathers, surrounding the cloacal opening; the under tail coverts.
Source: Webster’s Unabridged Dictionary 1913 Edition
14 June 2025
(noun) a member of a learned society; “he was elected a fellow of the American Physiological Association”
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