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