Quadrula

noun
Quad·​ru·​la | \ ˈkwädrələ\

Definition of Quadrula

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

History and Etymology for Quadrula

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

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