A (general) dodecahedron is a polyhedron having 12 faces. Examples include the Bilinski dodecahedron,
decagonal prism, elongated square dipyramid
(Johnson solid 
), hexagonal dipyramid, metabidiminished
icosahedron (
),
pentagonal antiprism, pentagonal cupola
(
), regular
dodecahedron, rhombic dodecahedron, snub disphenoid (
), trapezo-rhombic
dodecahedron, triakis tetrahedron, and
undecagonal pyramid.
Crystals of pyrite (
)
resemble slightly distorted dodecahedra (Steinhaus 1999, pp. 207-208), and sphalerite
(ZnS) crystals are irregular dodecahedra bounded by congruent deltoids (Steinhaus
1999, pp. 207 and 209). The hexagonal
scalenohedron is another irregular dodecahedron.
The regular dodecahedron, often simply called "the" dodecahedron, is the Platonic solid 
composed of 20 polyhedron
vertices, 30 polyhedron edges, and 12 pentagonal faces, 
. It is also uniform
polyhedron 
and Wenninger model 
.
It is given by the Schläfli symbol 
and the Wythoff
symbol 
.
