(n.) A rare element of the boron group, sometimes associated with yttrium or other related elements, as in euxenite and gadolinite. Symbol Yb; provisional atomic weight 173.2. Cf. Yttrium.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). ytterbium. Retrieved September 25, 2026, from http://smartdefine.org/ytterbium/definitions/2083326 |
| Chicago | Webster's. 2011. "ytterbium" http://smartdefine.org/ytterbium/definitions/2083326 (accessed September 25, 2026). |
| Harvard | Webster's 2011, ytterbium, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/ytterbium/definitions/2083326>. |
| MLA | Webster's. "ytterbium" 28 May 2011. Web. 25 September 2026. <http://smartdefine.org/ytterbium/definitions/2083326> |