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Definition of: trapezoid
(trap′ə·zoid) noun
1. Geom. a A quadrilateral of which two sides are parallel. b In England, a plane quadrilateral of which no two sides are parallel; a trapezium.
2. Anat. An irregular bone in the second row of the carpus, at the end of the forefinger. [<NL trapezoïdes <Gk. trapezoeidēs tablelike <trapeza a table + eidos a form]
—trap′e·zoi′dal adjective
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