pris·moid /ˈprɪzˌmɔɪd/
  棱晶樣的; 稜柱體; 平截頭稜錐體
  Pris·moid n.  A body that approaches to the form of a prism.
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  prismoid
       n : a prismatoid whose bases are polygons having the same number
           of sides and whose other faces are trapezoids or
           parallelograms