Do‐dec′a‐he″dron (?), n. [Gr. �; � twelve + � seat, bottom, base: cf. F. dodécaèdre.] (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.