Rhombicface
Rhombicface is a term used in geometry to denote a rhombus-shaped polygonal face of a polyhedron or tiling. By definition, a rhombus is a quadrilateral with all sides equal, so a rhombicface is a four-sided face in which the edges around the face are congruent and the opposite sides are parallel, making the face a parallelogram. The diagonals of a rhombicface are perpendicular and bisect each other, and the area of the face equals half the product of its diagonals.
Rhombicfaces occur prominently in rhombic polyhedra, such as the rhombic dodecahedron, which has 12 congruent rhombic
Terminology notes: the term rhombicface is not universally standardized, but it is used informally to describe
See also: rhombus, parallelogram, rhombic dodecahedron, rhombic triacontahedron, rhombille tiling.