Do*dec`a*he"dron (?), n. [Gr. ; twelve + seat, bottom, base: cf. F. dod'ecaedre.] Geom. & Crystallog.
A solid having twelve faces.
⇒ The regular dodecahedron is bounded by twelve equal and regular pentagons; the pyritohedron (see Pyritohedron) is related to it; the rhombic dodecahedron is bounded by twelve equal rhombic faces.
© Webster 1913.