n.; pl. E. Hexahedrons L. Hexahedra [ Hexa- + Gr. &unr_; seat, base, fr. &unr_; to sit: cf. F. hexaèdre. ] (Geom.) A solid body of six sides or faces. [ 1913 Webster ]
Regular hexahedron, a hexagon having six equal squares for its sides; a cube. [ 1913 Webster ]