noun Pla·cu·na \plaˈkyünə\

Definition of Placuna

  1. :  a genus of large flattened tropical bivalve mollusks (order Filibranchia) with extremely thin nearly transparent shells that is related to Anomia but sometimes made the type of a separate family — see windowpane oyster

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Origin and Etymology of placuna

New Latin, from Greek plak-, plax flat surface

Seen and Heard

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a rounded knoll or a ridge of ice

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