polyhedra
  polyhedron的複數形
  Pol·y·he·dron n.; pl. E. Polyhedrons. L. Polyhedra
  1. Geom. A body or solid contained by many sides or planes.
  2. Opt. A polyscope, or multiplying glass.
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  polyhedron
       n : a solid figure bounded by plane polygons or faces
       [also: polyhedra (pl)]