trapezoid
NounOpen English WordNet
Noun (2)
- a quadrilateral with two parallel sidesType of quadrilateral, quadrangle
- the wrist bone between the trapezium and the capitate bonesSynonyms: trapezoid boneos trapezoideumType of carpal bone, carpal
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Webster's Dictionary (1913)
Trap′e·zoid noun
Origin: Gr. … trapezoid-shaped; … table + … shape, likeness: cf. F. trapézoïde. See Trapezium.
1. Geometry A plane four-sided figure, having two sides parallel to each other.
2. Anatomy A bone of the carpus at the base of the second metacarpal, or index finger.
Trap′e·zoid adjective
1. Having the form of a trapezoid; trapezoidal; as, the trapezoid ligament which connects the coracoid process and the clavicle.
2. Anatomy Of or pertaining to the trapezoid ligament; as, the trapezoid line.
Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54