|—n , pl -ziums, -zia|
|1.||chiefly (Brit) Usual US and Canadian name: trapezoid a quadrilateral having two parallel sides of unequal length|
|2.||chiefly (US), (Canadian) a quadrilateral having neither pair of sides parallel|
|3.||a small bone of the wrist near the base of the thumb|
|[C16: via Late Latin from Greek trapezion, from trapeza table]|
|trapezium (trə-pē'zē-əm) Pronunciation Key
Plural trapeziums or trapezia
A four-sided plane figure having no parallel sides.