periproctn.

Brit.

/ˈpɛrɪprɒkt/, U.S.

/ˈpɛrəˌprɑkt/

Origin: A borrowing from Greek, combined with an English element. Etymons: peri- prefix, Greek πρωκτός.

Etymology: < peri- prefix + ancient Greek πρωκτός anus (see procto- comb. form).

Zoology.

In an echinoid: a small circular membranous region on the aboral surface containing the anus and a variable number of small embedded plates.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > member of > parts of > integument or body-wall > part surrounding anus

periproct1869

1869 Amer. Naturalist 3 216 His description of Leskia mirabilis, confirming the presence of the valvulate peristome and periproct ascribed to this curious genus of Spatangidæ [etc.].

1877 T. H. Huxley Man. Anat. Invertebrated Animals ix. 570 Within the circle formed by the genital and ocular plates the periproct presents a variable number of calcifications.

a1933 J. A. Thomson Biol. for Everyman (1934) I. x. 179 At the other pole the round canal ends in the anus, which is surrounded by a somewhat pebbly periproct.

1990 C. Pellant Rocks, Minerals & Fossils 139/1 Both bands run from the small circular mouth region (the peristome) on the underside of the test to the anal region (the periproct) on the upper surface.

Derivatives

periˈproctous adj. rare surrounding the anus; relating to the periproct of an echinoid.Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 Cent. Dict. Periproctous, surrounding the anus; circumanal; perirectal; specifically, in echinoderms, of or pertaining to the periproct.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online June 2022).

单词	periproct
释义	periproctn. Brit. /ˈpɛrɪprɒkt/, U.S. /ˈpɛrəˌprɑkt/ Origin: A borrowing from Greek, combined with an English element. Etymons: peri- prefix, Greek πρωκτός. Etymology: < peri- prefix + ancient Greek πρωκτός anus (see procto- comb. form). Zoology. In an echinoid: a small circular membranous region on the aboral surface containing the anus and a variable number of small embedded plates. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > member of > parts of > integument or body-wall > part surrounding anus periproct1869 1869 Amer. Naturalist 3 216 His description of Leskia mirabilis, confirming the presence of the valvulate peristome and periproct ascribed to this curious genus of Spatangidæ [etc.]. 1877 T. H. Huxley Man. Anat. Invertebrated Animals ix. 570 Within the circle formed by the genital and ocular plates the periproct presents a variable number of calcifications. a1933 J. A. Thomson Biol. for Everyman (1934) I. x. 179 At the other pole the round canal ends in the anus, which is surrounded by a somewhat pebbly periproct. 1990 C. Pellant Rocks, Minerals & Fossils 139/1 Both bands run from the small circular mouth region (the peristome) on the underside of the test to the anal region (the periproct) on the upper surface. Derivatives periˈproctous adj. rare surrounding the anus; relating to the periproct of an echinoid.Apparently only attested in dictionaries or glossaries. ΚΠ 1890 Cent. Dict. Periproctous, surrounding the anus; circumanal; perirectal; specifically, in echinoderms, of or pertaining to the periproct. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online June 2022). < n.1869
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