Trapezium
The word trapezium, used to describe a geometric shape, has two contradictory meanings:
- (outside the US and Canada) – a quadrilateral with one pair of parallel sides, known in the US as a trapezoid.
- (in the US and Canada) – a quadrilateral with no parallel sides (a shape known elsewhere as a general irregular quadrilateral).
The word trapezium can also mean:
- Trapezium (bone), a bone in the wrist
- Trapezium (astronomy), a group of stars in the Orion Nebula
- Trapezium (play), a play by Henry Rathvon
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