† pseudoproctn.

Origin: A borrowing from Greek, combined with an English element. Etymons: pseudo- comb. form, Greek πρωκτός.

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

Zoology. Obsolete. rare.

1. The anal opening of a sea urchin larva (echinopluteus).

ΚΠ

1863 W. Thomson in Nat. Hist. Rev. 3 397 They regarded the pseudostome as a special respiratory orifice for the starfish, while they assigned its own proper functions to the pseudoproct.

1865 Philos. Trans. (Royal Soc.) 155 522 The large ciliated..inversion of the sarcode is undoubtedly the pseudostome... The loop-like canal..is the extremely rudimentary pseudocele, and the round aperture is the pseudoproct.

1877 F. H. Butler in Encycl. Brit. VII. 631/2 The pseud-embryo or echinopædium..becomes..wedge-shaped; at its broad end appears the mouth or pseudostome, and at the other the anus or pseudoproct.

2. = pseudostome n. 2.

ΚΠ

1887 W. J. Sollas in Encycl. Brit. XXII. 416/1 In one sense the oscule [of a sponge] is always a pseudostome; it would be better if the term pseudoproct could be substituted.

Derivatives

† pseudoproctous adj. Obsolete rare Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 Cent. Dict. Pseudoproctous, provided with a pseudoproct.

This entry has been updated (OED Third Edition, September 2007; most recently modified version published online June 2021).

单词	pseudoproct
释义	† pseudoproctn. Origin: A borrowing from Greek, combined with an English element. Etymons: pseudo- comb. form, Greek πρωκτός. Etymology: < pseudo- comb. form + ancient Greek πρωκτός anus (see procto- comb. form). Zoology. Obsolete. rare. 1. The anal opening of a sea urchin larva (echinopluteus). ΚΠ 1863 W. Thomson in Nat. Hist. Rev. 3 397 They regarded the pseudostome as a special respiratory orifice for the starfish, while they assigned its own proper functions to the pseudoproct. 1865 Philos. Trans. (Royal Soc.) 155 522 The large ciliated..inversion of the sarcode is undoubtedly the pseudostome... The loop-like canal..is the extremely rudimentary pseudocele, and the round aperture is the pseudoproct. 1877 F. H. Butler in Encycl. Brit. VII. 631/2 The pseud-embryo or echinopædium..becomes..wedge-shaped; at its broad end appears the mouth or pseudostome, and at the other the anus or pseudoproct. 2. = pseudostome n. 2. ΚΠ 1887 W. J. Sollas in Encycl. Brit. XXII. 416/1 In one sense the oscule [of a sponge] is always a pseudostome; it would be better if the term pseudoproct could be substituted. Derivatives † pseudoproctous adj. Obsolete rare Apparently only attested in dictionaries or glossaries. ΚΠ 1890 Cent. Dict. Pseudoproctous, provided with a pseudoproct. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online June 2021). < n.1863
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