(n.) A rare metallic element of the boron-aluminium group, found in gadolinite and other rare minerals, and extracted as a dark gray powder. Symbol Y. Atomic weight, 89.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Yttrium. Retrieved September 21, 2026, from http://smartdefine.org/yttrium/definitions/2083331 |
| Chicago | Webster's. 2011. "Yttrium" http://smartdefine.org/yttrium/definitions/2083331 (accessed September 21, 2026). |
| Harvard | Webster's 2011, Yttrium, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/yttrium/definitions/2083331>. |
| MLA | Webster's. "Yttrium" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/yttrium/definitions/2083331> |