/trap"euh zoyd'/ , n.
1. Geom.
a. a quadrilateral plane figure having two parallel and two nonparallel sides.
b. Brit. trapezium (def. 1b).
2. Anat. a bone in the wrist that articulates with the metacarpal bone of the forefinger.
adj.
3. Also, trapezoidal . Geom. of, pertaining to, or having the form of a trapezoid.
[ 1695-1705; trapezoides trapezoeidés trapeziumlike. See TRAPEZIUM, -OID ]