#parallelepiped__parallelopiped__parallelepipedon__parallelopipedon  a prism whose bases are parallelograms
  supertype:  #prism  a polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms
  subtype:  #cuboid  a rectangular parallelepiped
  subtype:  #rhombohedron  a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)

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