1. (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.

2. (a.) Having four prominent longitudinal angles.

3. (a.) Designating, or belonging to, a certain system of crystallization; dimetric. See Crystallization.

cube-shaped cubic cubiform cuboid diced foursquare oblong orthogonal quadrangular quadrate quadriform quadrilateral rectangular rhombic rhomboid square tetragonal tetrahedral trapezohedral trapezoid