- (n.) A bone of the carpus at the base of the first metacarpal or thumb.
- (n.) A plane figure bounded by four right lines, of which no two are parallel.
- (n.) 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.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). trapezium. Retrieved September 22, 2026, from http://smartdefine.org/trapezium/definitions/2074209 |
| Chicago | Webster's. 2011. "trapezium" http://smartdefine.org/trapezium/definitions/2074209 (accessed September 22, 2026). |
| Harvard | Webster's 2011, trapezium, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/trapezium/definitions/2074209>. |
| MLA | Webster's. "trapezium" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/trapezium/definitions/2074209> |