Dictionary & Thesaurus

trapezium

1.	(noun) the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals
	Synonyms: os trapezium, trapezium bone
	Related Words: carpal, carpal bone, wrist bone

2.	(noun) (in US) a quadrilateral with no parallel sides
	Related Words: quadrangle, quadrilateral, tetragon
	Antonyms: parallelogram