• WordNet 3.6
    • n Placuna windowpane oysters
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Century Dictionary and Cyclopedia
    • n placuna The typical genus of Placunidæ. They have thin, more or less translucent shells, which are nearly equivalve, and no byssus. Several species inhabit East Indian seas. P. placenta is known as the window-shell, P. sella as the saddle-shell.
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