do·dec·a·he·dron 
(dō′dĕk-ə-hēdrən)
(dō′dĕk-ə-hēdrən)n. pl. do·dec·a·he·drons or do·dec·a·he·dra (-drə)
A polyhedron with 12 faces.
[Greek dōdekaedron, from neuter of Greek dōdekaedros, having twelve sides : dōdeka, twelve; see DODECAGON + -edros, sided; see -HEDRON.]
do′dec·a·hedral adj.
dodecahedron