Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The area around the anus in certain invertebrates, such as echinoderms.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The region surrounding the anus, particularly in echinoderms.

from the GNU version of the Collaborative International Dictionary of English

  • n. The region surrounding the anus, particularly of echinoderms.

from The Century Dictionary and Cyclopedia

  • n. The circumanal bodywall of an echinoderm; the aboral part of the perisome immediately about the anus: the opposite of peristome.

Etymologies

peri- + Greek prōktos, anus.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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