Rhombus

An equilateral parallelogram. Each face of the rhombohedron above is a rhombus. A rhombus's area is the length of one side times the height (the distance between opposite sides). The plural form can be either rhombbuses or rhombbi.(pr. ROM-bəs)Also see polygon, quadrilateral, rectangle, rhombohedron, square, trapezium, and trapezoid.