Trapezium

The term trapezium can mean more than one thing:

• In human anatomy, trapezium is a bone in the hand
• In geometry, a trapezium is also a name for a class of quadrilaterals. The precise definition differs between American English and British English, as described in that article; see also trapezoid.
• In astronomy, a grouping of four young stars (an open cluster) and the associated gas in the Orion Nebula. [1]
• In theatre, a play by Henry Rathvon