- Geometry.
- a quadrilateral plane figure having two parallel and two nonparallel sides.
- trapezium (def. 1b).
- a bone in the wrist that articulates with the metacarpal bone of the forefinger.
- of, relating to, or having the form of a trapezoid.
- a quadrilateral having neither pair of sides parallel
- a quadrilateral having two parallel sides of unequal length
- a small bone of the wrist near the base of the index finger
