crissum definition

  • noun:
    • The feathers or area beneath the end of a bird surrounding the cloacal opening.
    • the region of feathers on a bird that surround its cloaca.
    • That section of a bird, or the feathers, surrounding the cloacal opening; the under end coverts.
    • In ornithology, the location amongst the anus while the end of a bird; specifically, the feathers of the area, the vent-feathers or under tail-coverts, collectively. See cut under bird.
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