Deltohedron

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Deltohedron \Del`to*he"dron\, n. [Gr. de`lta, the letter [Delta]
     + 'e`dra seat, base.] (Crystallog.)
     A solid bounded by twelve quadrilateral faces. It is a
     hemihedral form of the isometric system, allied to the
     tetrahedron.
     [1913 Webster]