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Tridacna

[trih-dak-nuh] /trɪˈdæk nə/
noun
1.
a genus of giant clams inhabiting reefs in the South Pacific, attaining a diameter of 4 feet (1.2 meters) or more, and weighing over 500 pounds (227 kg).
Origin of Tridacna
1770-1780
1770-80; < New Latin, noun use of feminine of Latin tridacnus requiring three bites < Greek trídaknos, equivalent to tri- tri- + dákn(ein) to bite + -os adj. suffix
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for Tridacna
Historical Examples
  • Tridacna is distinguished from Hippopus by the large opening in the hinge.

    A Conchological Manual George Brettingham Sowerby
  • A Tridacna spread its jaws before his steps so that he nearly plunged into the deadly springtrap of the deep.

  • The former is supposed to have originated from the Tridacna shell, the latter from the taro.

  • The shell of the Tridacna gigas is the largest anywhere known.

  • The valves of Tridacna gigas are sometimes found a yard and a half in length, and weighing five hundred pounds.

    The Ocean World: Louis Figuier
  • Tridacna safrana is of a beautiful blue round the edges, rayed through a shade of very pale blue.

    The Ocean World: Louis Figuier
  • The accompanying representations of Tridacna squamosa (Figs. 149 and 150) will convey a general idea of the genus.

    The Ocean World: Louis Figuier
  • Arched or vaulted, as the exfoliations on the cost of Tridacna Elongata, fig. 157.

    A Conchological Manual George Brettingham Sowerby
  • A few are fashioned out of the thick portion of the shell of Tridacna gigas.

    The Solomon Islands and Their Natives

    H. B. (Henry Brougham) Guppy
  • Strictly speaking, the Singapore oyster is a gigantic species of Clam, (Tridacna).

    The Castaways Captain Mayne Reid

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