# Definition:Dodecahedron

## Definition

A dodecahedron is a polyhedron which has $12$ faces.

### Regular Dodecahedron

A regular dodecahedron is a dodecahedron whose $12$ faces are all congruent regular pentagons.

## Linguistic Note

The word dodecahedron derives from the Classical Greek δωδεκάεδρόν:

dodeca (δωδεκά), meaning twelve
hedron (a form of ἕδρα), meaning base or seat.

The technically correct plural of dodecahedron is dodecahedra, but the word dodecahedrons can often be found.