Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The flexible membrane around the anus of certain invertebrates, especially echinoids.
from The Century Dictionary.
- noun The circumanal bodywall of an echinoderm; the aboral part of the perisome immediately about the anus: the opposite of
peristome .
from the GNU version of the Collaborative International Dictionary of English.
- noun (Zoöl.) The region surrounding the anus, particularly of echinoderms.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun zoology The region surrounding the
anus , particularly inechinoderms .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
[peri– + Greek prōktos, anus.]
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Examples
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