Mactran.

Brit.

/ˈmaktrə/, U.S.

/ˈmæktrə/

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

Etymology: < scientific Latin Mactra ( Linnaeus Systema Naturæ (ed. 12, 1767) I. ii. 1125) < ancient Greek μάκτρα kneading trough, cognate with μάσσειν to knead (see magma n.). Compare French mactre (1808).

Zoology.

A genus of marine bivalve molluscs of the family Tridacnidae (formerly Mactridae), which are typically several centimetres long with thin, triangular to ovate shells; (also mactra, plural mactrae, mactras) a mollusc of this genus, or its shell.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > bivalves > of particular type > other types

heart1750

sea-clam1765

Mactra1777

terebellum1851

red nose1856

red nose1864

taxodont1896

Pismo clam1911

pectinoid1952

1777 T. Pennant Brit. Zool. 91 Mactra. Its animal a tethys.

1824 C. Dubois Epit. Lamarck's Arrangem. Testacea 45 The Mactrae..are marine shells..almost always subtriangular.

1892 C. M. Yonge Autobiogr. in C. R. Coleridge Yonge (1903) 70 An exquisite beach of white sand, over which curled and dashed waves from the Atlantic, bringing in razor shells, tellinas of a delicate pink, cockles, and mactras.

1963 D. W. Humphries & E. E. Humphries tr. H. Termier & G. Termier Erosion & Sedimentation xi. 236 The pelecypods of the sea bed (Donax, Pholas, Mactra) and alcyonarias also die if they are contaminated by this environment.

1996 Jrnl. Shellfish Res. 15 331 Small S. aequilatera were more common in shallow, inshore waters than offshore, whereas the reverse pattern of size with depth was exhibited by the two Mactra species.

This is a new entry (OED Third Edition, March 2000; most recently modified version published online March 2022).

单词	mactra
释义	Mactran. Brit. /ˈmaktrə/, U.S. /ˈmæktrə/ Origin: A borrowing from Latin. Etymon: Latin Mactra. Etymology: < scientific Latin Mactra ( Linnaeus Systema Naturæ (ed. 12, 1767) I. ii. 1125) < ancient Greek μάκτρα kneading trough, cognate with μάσσειν to knead (see magma n.). Compare French mactre (1808). Zoology. A genus of marine bivalve molluscs of the family Tridacnidae (formerly Mactridae), which are typically several centimetres long with thin, triangular to ovate shells; (also mactra, plural mactrae, mactras) a mollusc of this genus, or its shell. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > bivalves > of particular type > other types heart1750 sea-clam1765 Mactra1777 terebellum1851 red nose1856 red nose1864 taxodont1896 Pismo clam1911 pectinoid1952 1777 T. Pennant Brit. Zool. 91 Mactra. Its animal a tethys. 1824 C. Dubois Epit. Lamarck's Arrangem. Testacea 45 The Mactrae..are marine shells..almost always subtriangular. 1892 C. M. Yonge Autobiogr. in C. R. Coleridge Yonge (1903) 70 An exquisite beach of white sand, over which curled and dashed waves from the Atlantic, bringing in razor shells, tellinas of a delicate pink, cockles, and mactras. 1963 D. W. Humphries & E. E. Humphries tr. H. Termier & G. Termier Erosion & Sedimentation xi. 236 The pelecypods of the sea bed (Donax, Pholas, Mactra) and alcyonarias also die if they are contaminated by this environment. 1996 Jrnl. Shellfish Res. 15 331 Small S. aequilatera were more common in shallow, inshore waters than offshore, whereas the reverse pattern of size with depth was exhibited by the two Mactra species. This is a new entry (OED Third Edition, March 2000; most recently modified version published online March 2022). < n.1777
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