Rectangularly and Tetragonal

adjective

• Of or relating to or shaped like a quadrilateral. .

• (a.) Of or pertaining to a tetragon; having four angles or sides; thus, the square, the parallelogram, the rhombus, and the trapezium are tetragonal fingers.
• (a.) Designating or belonging to, a certain system of crystallization; dimetric. See Tetragonal system, under Crystallization.
• (a.) Having four prominent longitudinal angles.