noun. the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals.
noun. a quadrilateral with no parallel sides.
noun. a multiple star in the constellation of Orion.
1. Noun, singular or mass If the shape you're looking at doesn't have at least one set of parallel sides, it's not a trapezoid; it's something called a trapezium instead.
