Trap″e‐zoid (?), n. [Gr. � trapezoid-shaped; � table + � shape, likeness: cf. F. trapézoïde. See Trapezium.] 1. (Geom.) A plane four-sided figure, having two sides parallel to each other.
2. (Anat.) A bone of the carpus at the base of the second metacarpal, or index finger.