1. (n.) A plane four-sided figure, having two sides parallel to each other.

2. (n.) A bone of the carpus at the base of the second metacarpal, or index finger.

3. (a.) Having the form of a trapezoid; trapezoidal; as, the trapezoid ligament which connects the coracoid process and the clavicle.

4. (a.) of or pertaining to the trapezoid ligament; as, the trapezoid line.

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