D defs.my
Entry 1 sense Webster, 1913

Deltohedron

· Del·to·he·dron · IPA
01 n. A solid bounded by twelve quadrilateral faces. It is a hemihedral form of the isometric system, allied to the tetrahedron.
  1. 1.
    A solid bounded by twelve quadrilateral faces. It is a hemihedral form of the isometric system, allied to the tetrahedron.(Crystallog.)