trapezium
nounUS /tɹæˈpi.zi.əm/ · /tɹəˈpiː.zi.əm/
Etymology Learned borrowing from Late Latin trapezium, borrowed from Ancient Greek τρᾰπέζῐον (trăpézĭon, “irregular quadrilateral”, literally “small table”), from τράπεζα (trápeza, “table”) + -ιον (-ion, diminutive suffix). First attested in 1570. Doublet of trapeze.
Geometry, Mathematics, Sciences Australia, New Zealand, UK A quadrilateral with two sides parallel.
Geometry, Mathematics, Sciences Australia, New Zealand, UK A quadrilateral with two sides parallel and two sides non-parallel.
Geometry, Mathematics, Sciences US, Dated A four-sided polygon with no parallel sides and no sides equal; a simple convex irregular quadrilateral.
A region on the ventral side of the brain, either just back of the pons Varolii, or, as in man, covered by the posterior extension of its transverse fibers.
- Derived terms
- scaphotrapezium, trapezium rule
- Related terms
- trapeze, trapeziform, trapezius, trapezoid