opisthobranchn.adj.

Brit.

/ə(ʊ)ˈpɪsθəˌbraŋk/, U.S.

/əˈpɪsθoʊˌbræŋk/

Forms:

α. 1800s opisthobranche.

β. 1800s– opisthobranch.

Origin: Formed within English, by compounding; modelled on a French lexical item. Etymons: opistho- comb. form, -branch comb. form.

Etymology: < opistho- comb. form + -branch comb. form, after French opisthobranches, plural (1846). Compare scientific Latin Opisthobranchia , subclass name (originally order name; 1883 or earlier). Compare slightly later opisthobranchiate adj.

Zoology.

A. n.

A gastropod mollusc of the subclass Opisthobranchia, comprising marine forms (mostly sea slugs) having the gills behind the heart. Cf. prosobranch n.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > superorder Branchifera > order Opisthobranchiata > member of

sea-slug1845

opisthobranch1851

opisthobranchiate1885

1851 S. P. Woodward Man. Mollusca i. 58 Reducing the pteropods to the rank of an order, which might be placed next to the opistho-branches.

a1865 S. P. Woodward Man. Mollusca (1866) i. i. 40 The sexes are..united in the (monœcious) land-snails, pteropods, opisthobranchs, and in some of the conchifers.

1877 T. H. Huxley Man. Anat. Invertebrated Animals viii. 511 No Opisthobranch possesses a large visceral sac of this kind.

1925 P. Radin & V. C. C. Collum tr. E. Perrier Earth before Hist. ii. vi. 156 No carnivorous Monocardiac, Opisthobranch, or Pteropod occurs in fresh water.

1974 Nature 5 Apr. 512/2 Many saccoglossan opisthobranchs eat species of siphonaceous algae almost exclusively.

2000 C. Tudge Variety of Life ii. vii. 242 In opisthobranchs, the body is generally uncoiled (detorted) to some extent.

B. adj.

Belonging to or characteristic of the subclass Opisthobranchia.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [adjective] > of superorder Branchifera > belonging to order Opisthobranchiata

opisthobranchiate1852

opisthobranch1890

1890 Cent. Dict. Opisthobranch, having posterior gills; specifically, of or pertaining to the Opisthobranchiata.

1939 Kongelige Norske Videnskabers Selskabs Skrifter i. 5 In this respect they differ from the shell-bearing Opisthobranchs.

1977 Trans. Zool. Soc. 34 1 (heading) Anatomical changes in nervous and vascular systems during the transition from prosobranch to opisthobranch organization.

1996 C. Little Biol. of Rocky Shores 151 Some of the most colourful opisthobranch gastropods are the nudibranchs or sea slugs.

Derivatives

† opisthobranchism n. Obsolete rare the condition of being opisthobranchiate.Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 Cent. Dict. Opisthobranchism, disposition of the gills of a mollusk behind the heart; the character of being opisthobranchiate.

This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022).

单词	opisthobranch
释义	opisthobranchn.adj. Brit. /ə(ʊ)ˈpɪsθəˌbraŋk/, U.S. /əˈpɪsθoʊˌbræŋk/ Forms: α. 1800s opisthobranche. β. 1800s– opisthobranch. Origin: Formed within English, by compounding; modelled on a French lexical item. Etymons: opistho- comb. form, -branch comb. form. Etymology: < opistho- comb. form + -branch comb. form, after French opisthobranches, plural (1846). Compare scientific Latin Opisthobranchia , subclass name (originally order name; 1883 or earlier). Compare slightly later opisthobranchiate adj. Zoology. A. n. A gastropod mollusc of the subclass Opisthobranchia, comprising marine forms (mostly sea slugs) having the gills behind the heart. Cf. prosobranch n. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [noun] > superorder Branchifera > order Opisthobranchiata > member of sea-slug1845 opisthobranch1851 opisthobranchiate1885 1851 S. P. Woodward Man. Mollusca i. 58 Reducing the pteropods to the rank of an order, which might be placed next to the opistho-branches. a1865 S. P. Woodward Man. Mollusca (1866) i. i. 40 The sexes are..united in the (monœcious) land-snails, pteropods, opisthobranchs, and in some of the conchifers. 1877 T. H. Huxley Man. Anat. Invertebrated Animals viii. 511 No Opisthobranch possesses a large visceral sac of this kind. 1925 P. Radin & V. C. C. Collum tr. E. Perrier Earth before Hist. ii. vi. 156 No carnivorous Monocardiac, Opisthobranch, or Pteropod occurs in fresh water. 1974 Nature 5 Apr. 512/2 Many saccoglossan opisthobranchs eat species of siphonaceous algae almost exclusively. 2000 C. Tudge Variety of Life ii. vii. 242 In opisthobranchs, the body is generally uncoiled (detorted) to some extent. B. adj. Belonging to or characteristic of the subclass Opisthobranchia. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Gastropoda > [adjective] > of superorder Branchifera > belonging to order Opisthobranchiata opisthobranchiate1852 opisthobranch1890 1890 Cent. Dict. Opisthobranch, having posterior gills; specifically, of or pertaining to the Opisthobranchiata. 1939 Kongelige Norske Videnskabers Selskabs Skrifter i. 5 In this respect they differ from the shell-bearing Opisthobranchs. 1977 Trans. Zool. Soc. 34 1 (heading) Anatomical changes in nervous and vascular systems during the transition from prosobranch to opisthobranch organization. 1996 C. Little Biol. of Rocky Shores 151 Some of the most colourful opisthobranch gastropods are the nudibranchs or sea slugs. Derivatives † opisthobranchism n. Obsolete rare the condition of being opisthobranchiate.Apparently only attested in dictionaries or glossaries. ΚΠ 1890 Cent. Dict. Opisthobranchism, disposition of the gills of a mollusk behind the heart; the character of being opisthobranchiate. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022). < n.adj.1851
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