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inequivalve

[in-ee-kwuh-valv]
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adjective
  1. (of a bivalve mollusk) having the valves of the shell unequal in shape and size.
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Origin of inequivalve

First recorded in 1770–80; in-3 + equi- + valve
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for inequivalve

Historical Examples

  • In the former, all the shells are inequivalve; in the latter equivalve.

    A Conchological Manual

    George Brettingham Sowerby

  • A bivalve is said to be equivalve when the two shells composing it are of the same size, inequivalve when they are not.

  • Asymmetrical, inequivalve, fixed, with extensive pallial sutures; no siphons.