Trapezoid
WordNet
noun
(1) The wrist bone between the trapezium and the capitate bones
(2) A quadrilateral with two parallel sides
WiktionaryText
English
Noun
- A (convex) quadrilateral with two (non-adjacent) parallel sides.
- The trapezoid bone of the wrist.
- A convex quadrilateral with no sides parallel and no equal sides.