Molluscan.

Brit.

/məˈlʌskə/, U.S.

/məˈləskə/

Origin: A borrowing from Latin. Etymon: Latin Mollusca.

Etymology: < post-classical Latin Mollusca, name of a group comprising cephalopods (J. Jonston Historiæ Naturalis (1650) ii. 3/1, after use of classical Latin mollia (in Pliny), ancient Greek μαλάκια (in Aristotle) as the name of such a group; subsequently adopted in scientific Latin: see definition), use as noun of neuter plural of classical Latin molluscus (see note below) < mollis soft (see moll adj.) + -scus , variant (with -s- extension) of -cus , suffix forming adjectives. See also mollusc n.Classical Latin molluscus occurs as an adjective in nux mollusca , a kind of nut with a thin shell and soft interior, and as noun, mollusca (feminine), short for nux mollusca , and molluscum (neuter), denoting an excrescence on a tree (see molluscum n.).

Zoology.

In form Mollusca, with singular or plural agreement. Originally: a heterogeneous group of mostly shell-less invertebrates, forming the second order of the class Vermes in Linnaeus's classification ( Systema Naturæ (ed. 10, 1758) I. vi. ii. 652) and including cephalopods, echinoderms, hydroids, slugs, and annelids. Now, mainly following the classification proposed by Cuvier in 1788–1800: a phylum of invertebrates that live in aquatic or damp habitats and have a soft, unsegmented body and usually an external calcareous shell. Also, with plural agreement (also mollusca): animals of this phylum (collectively or individually). The phylum includes gastropods (slugs and snails), bivalves (clams, oysters, etc.), and cephalopods (octopuses, squids, and cuttlefishes). Cuvier's original phylum also included brachiopods (lamp shells), tunicates, and cirripedes (barnacles). Bryozoans were included among the Mollusca for a time, and then separated again.

ΘΚΠ

the world > animals > invertebrates > [noun] > specific groups of

Mollusca1661

Acrita1823

microzoon1859

microzoary1863

malacozoic series1877

protostome1958

acoelomate1964

protostomian1968

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun]

Mollusca1828

1661 R. Lovell Πανζωορυκτολογια, sive Panzoologicomineralogia sig. b6 The Mollusca,..some have acetabula, and two long trunks, which they use as anchors in stormes.

1776 E. M. da Costa Elements Conchol. 131 As for making them a genus of Mollusca, with the Sea Stars, &c. as Linnaeus does, I can no wise approve it.

1783 J. Barbut Genera Vermium I. Pref. p. iv The animals of the Mollusca, bear so strong a resemblance in form and generic character to those inhabiting shells.

1797 Encycl. Brit. XII. 204/1 Mollusca, in the Linnæan system, is the denomination of the second genus of vermes or worms. These are simple naked animals, not included in a shell, but furnished with limbs.

1801 W. Turton tr. C. Linnaeus Gen. Syst. Nature IV. 3 Class VI. Worms... They are divided into five Orders. I. Intestina... II. Mollusca. Are naked, furnished with tentacula or arms, for the most part inhabitants of the sea.

1828 J. Fleming Hist. Brit. Animals 224 It is my intention to proceed to the consideration of the species [of Radiata]..immediately after the enumeration of the Mollusca.

1851 S. P. Woodward Man. Mollusca i. 6 The mollusca are animals with soft bodies, enveloped in a muscular skin.

1875 Zoologist 10 4313 Sponges, Anemones, and Tunicate Mollusca.

1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 289 In many Mollusca..certain parts of the epithelial covering of the pericardium are glandular.

1937 G. D. Hanna in C. L. Camp & G. D. Hanna Methods in Paleontol. ii. 79 Under the term macrofossils it will be desirable to treat together many of the larger groups of invertebrates such as the Mollusca, Brachiopoda, Echinodermata, Bryozoa, and Crustacea.

1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) viii. 169 The gentle slopes are favorable to the growth of various mollusca whose hard parts contribute additional material to the growing limestone.

1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) xiii. 202 The phylum Mollusca consists of unsegmented invertebrate animals without jointed appendages.

1964 V. J. Chapman Coastal Vegetation i. 16 Crabs, mollusca and annelids.

1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) iii. 290/1 About 50,000 species of molluscs have been described, making Mollusca the third largest phylum after Mandibulata..and Chelicerata.

This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022).

单词	mollusca
释义	Molluscan. Brit. /məˈlʌskə/, U.S. /məˈləskə/ Origin: A borrowing from Latin. Etymon: Latin Mollusca. Etymology: < post-classical Latin Mollusca, name of a group comprising cephalopods (J. Jonston Historiæ Naturalis (1650) ii. 3/1, after use of classical Latin mollia (in Pliny), ancient Greek μαλάκια (in Aristotle) as the name of such a group; subsequently adopted in scientific Latin: see definition), use as noun of neuter plural of classical Latin molluscus (see note below) < mollis soft (see moll adj.) + -scus , variant (with -s- extension) of -cus , suffix forming adjectives. See also mollusc n.Classical Latin molluscus occurs as an adjective in nux mollusca , a kind of nut with a thin shell and soft interior, and as noun, mollusca (feminine), short for nux mollusca , and molluscum (neuter), denoting an excrescence on a tree (see molluscum n.). Zoology. In form Mollusca, with singular or plural agreement. Originally: a heterogeneous group of mostly shell-less invertebrates, forming the second order of the class Vermes in Linnaeus's classification ( Systema Naturæ (ed. 10, 1758) I. vi. ii. 652) and including cephalopods, echinoderms, hydroids, slugs, and annelids. Now, mainly following the classification proposed by Cuvier in 1788–1800: a phylum of invertebrates that live in aquatic or damp habitats and have a soft, unsegmented body and usually an external calcareous shell. Also, with plural agreement (also mollusca): animals of this phylum (collectively or individually). The phylum includes gastropods (slugs and snails), bivalves (clams, oysters, etc.), and cephalopods (octopuses, squids, and cuttlefishes). Cuvier's original phylum also included brachiopods (lamp shells), tunicates, and cirripedes (barnacles). Bryozoans were included among the Mollusca for a time, and then separated again. ΘΚΠ the world > animals > invertebrates > [noun] > specific groups of Mollusca1661 Acrita1823 microzoon1859 microzoary1863 malacozoic series1877 protostome1958 acoelomate1964 protostomian1968 the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] Mollusca1828 1661 R. Lovell Πανζωορυκτολογια, sive Panzoologicomineralogia sig. b6 The Mollusca,..some have acetabula, and two long trunks, which they use as anchors in stormes. 1776 E. M. da Costa Elements Conchol. 131 As for making them a genus of Mollusca, with the Sea Stars, &c. as Linnaeus does, I can no wise approve it. 1783 J. Barbut Genera Vermium I. Pref. p. iv The animals of the Mollusca, bear so strong a resemblance in form and generic character to those inhabiting shells. 1797 Encycl. Brit. XII. 204/1 Mollusca, in the Linnæan system, is the denomination of the second genus of vermes or worms. These are simple naked animals, not included in a shell, but furnished with limbs. 1801 W. Turton tr. C. Linnaeus Gen. Syst. Nature IV. 3 Class VI. Worms... They are divided into five Orders. I. Intestina... II. Mollusca. Are naked, furnished with tentacula or arms, for the most part inhabitants of the sea. 1828 J. Fleming Hist. Brit. Animals 224 It is my intention to proceed to the consideration of the species [of Radiata]..immediately after the enumeration of the Mollusca. 1851 S. P. Woodward Man. Mollusca i. 6 The mollusca are animals with soft bodies, enveloped in a muscular skin. 1875 Zoologist 10 4313 Sponges, Anemones, and Tunicate Mollusca. 1896 J. W. Kirkaldy & E. C. Pollard tr. J. E. V. Boas Text Bk. Zool. 289 In many Mollusca..certain parts of the epithelial covering of the pericardium are glandular. 1937 G. D. Hanna in C. L. Camp & G. D. Hanna Methods in Paleontol. ii. 79 Under the term macrofossils it will be desirable to treat together many of the larger groups of invertebrates such as the Mollusca, Brachiopoda, Echinodermata, Bryozoa, and Crustacea. 1940 F. F. Grout Kemp's Handbk. Rocks (ed. 6) viii. 169 The gentle slopes are favorable to the growth of various mollusca whose hard parts contribute additional material to the growing limestone. 1960 D. C. Braungart & R. Buddeke Introd. Animal Biol. (ed. 5) xiii. 202 The phylum Mollusca consists of unsegmented invertebrate animals without jointed appendages. 1964 V. J. Chapman Coastal Vegetation i. 16 Crabs, mollusca and annelids. 1998 L. Margulis & K. V. Schwartz Five Kingdoms (ed. 3) iii. 290/1 About 50,000 species of molluscs have been described, making Mollusca the third largest phylum after Mandibulata..and Chelicerata. This entry has been updated (OED Third Edition, September 2002; most recently modified version published online March 2022). < n.1661
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