(n.) A metallic element separated from ytterbium in 1907, by Urbain in Paris and by von Welsbach in Vienna. Symbol, Lu; at. wt. 174.0.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). lutecium. Retrieved September 24, 2026, from http://smartdefine.org/lutecium/definitions/2029321 |
| Chicago | Webster's. 2011. "lutecium" http://smartdefine.org/lutecium/definitions/2029321 (accessed September 24, 2026). |
| Harvard | Webster's 2011, lutecium, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/lutecium/definitions/2029321>. |
| MLA | Webster's. "lutecium" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/lutecium/definitions/2029321> |