noun Quad·ru·la \ˈkwädrələ\

Definition of Quadrula

  1. :  a genus of freshwater mussels (family Unionidae) having a thick shell and often being approximately square in shape

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Origin and Etymology of quadrula

New Latin, from Late Latin, small square, from Latin quadra square + -ula; akin to Latin quattuor four

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feeling or affected by lethargy

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