from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of several bivalve marine mollusks of the genus Pinctada and related genera of tropical waters, especially P. margaritifera, a major commercial source of pearls.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of several bivalve molluscs that are a source of pearls, but especially Pinctada margaritifera

from the GNU version of the Collaborative International Dictionary of English

  • n. See under Pearl.
  • n. any one of several species of large tropical marine bivalve mollusks of the genus Meleagrina, or Margaritifera, found in the East Indies (especially at Ceylon), in the Persian Gulf, on the coast of Australia, and on the Pacific coast of America. Called also pearl shell, and pearl mussel.

from The Century Dictionary and Cyclopedia

  • n. A pearl-bearing bivalve mollusk of the family Aviculidæ, as Meleagrina margaritifera of Indian seas, and other species. See cut under Meleagrina.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. tropical marine bivalve found chiefly off eastern Asia and Pacific coast of North America and Central America; a major source of pearls


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