perisomen.

Brit.

/ˈpɛrᵻsəʊm/, U.S.

/ˈpɛrəˌsoʊm/

Forms:

α. 1800s perisom, 1800s– perisome.

β. 1800s perisoma.

Origin: Formed within English, by derivation. Etymons: peri- prefix, -some comb. form.

Etymology: < peri- prefix + -some comb. form.With perisomial adj. at Derivatives compare earlier perisomal adj.¹ and perisomatic adj.¹

Zoology. Now rare.

The integument or body wall of an echinoderm, on which the external calcareous skeleton is developed.

ΘΚΠ

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

perisome1863

1863 Proc. Royal Soc. 1862–3 12 428 The mouth and alimentary canal of the larva disappear, and the external sarcode-layer subsides round the calcareous framework of the included embryo, forming for it a transparent perisom.

1872 H. A. Nicholson Man. Palæontol. 102 The class Echinodermata..is distinguished by the fact that the external envelope of the body (‘perisome’) has the power of secreting calcareous matter to a greater or less extent.

1877 C. W. Thomson Voy. ‘Challenger’ I. iii. 172 The perisom is divided into four muscular bands.

1901 Amer. Naturalist 35 490 Dorsal perisome without large plates.

Derivatives

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

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > belonging to or resembling echinoderms > of parts of > of or relating to integument or body-wall

perisomal1876

perisomatic1877

perisomial1893

1893 New Sydenham Soc. Lexicon Perisomial, the same as Perisomatic.

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

单词	perisome
释义	perisomen. Brit. /ˈpɛrᵻsəʊm/, U.S. /ˈpɛrəˌsoʊm/ Forms: α. 1800s perisom, 1800s– perisome. β. 1800s perisoma. Origin: Formed within English, by derivation. Etymons: peri- prefix, -some comb. form. Etymology: < peri- prefix + -some comb. form.With perisomial adj. at Derivatives compare earlier perisomal adj.¹ and perisomatic adj.¹ Zoology. Now rare. The integument or body wall of an echinoderm, on which the external calcareous skeleton is developed. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > member of > parts of > integument or body-wall perisome1863 1863 Proc. Royal Soc. 1862–3 12 428 The mouth and alimentary canal of the larva disappear, and the external sarcode-layer subsides round the calcareous framework of the included embryo, forming for it a transparent perisom. 1872 H. A. Nicholson Man. Palæontol. 102 The class Echinodermata..is distinguished by the fact that the external envelope of the body (‘perisome’) has the power of secreting calcareous matter to a greater or less extent. 1877 C. W. Thomson Voy. ‘Challenger’ I. iii. 172 The perisom is divided into four muscular bands. 1901 Amer. Naturalist 35 490 Dorsal perisome without large plates. Derivatives † perisomial adj. Obsolete rare Apparently only attested in dictionaries or glossaries. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > belonging to or resembling echinoderms > of parts of > of or relating to integument or body-wall perisomal1876 perisomatic1877 perisomial1893 1893 New Sydenham Soc. Lexicon Perisomial, the same as Perisomatic. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1863
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