prismatoid

Noun
  1. A polyhedron whose vertices all lie in one or the other of two parallel planes;
    The faces that lie in those planes are the bases of the prismatoid (synset 113940907)
    is a type of: polyhedron - a solid figure bounded by plane polygons or faces
    subtypes: prismoid - a prismatoid whose bases are polygons having the same number of sides and whose other faces are trapezoids or parallelograms

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