Trapezium

Trapezium, plural trapezia, may refer to:

Trapezium, in British and other forms of English, a trapezoid, a quadrilateral that has exactly one pair of parallel sides
Trapezium, in North American English, an irregular quadrilateral with no sides parallel
Trapezium (bone), a bone in the hand
Trapezium Cluster, a group of stars in the Orion Nebula
Trapezia (genus), guard crabs
Trapezium (novel), a Japanese novel by Kazumi Takayama