See also:

• OCTAHEDRON (Gr. 6K-rw, eight, Mpa, base)

OCTAHEDRON (Gr. 6K-rw, eight, Mpa, See also:

• BASE

base)  , a solid bounded by eight triangular faces; it has 6 vertices and 12 edges . The See also:

• REGULAR

regular See also:

• OCTAHEDRON (Gr. 6K-rw, eight, Mpa, base)

octahedron has for its faces equilateral triangles; it is the reciprocal of the See also:

• CUBE (Gr. K46os, a cube)

cube . Octahedra having triangular faces other than equilateral occur as crystal forms . See See also:

• POLYHEDRON (Gr. rain, many, ESpa, a base)

POLYHEDRON and See also:

• CRYSTALLOGRAPHY
• CRYSTALLOGRAPHY (from the Gr. Kpbo TaXXO , ice, and -ypachew, to write)

CRYSTALLOGRAPHY .