(n.) A rare white earthy substance, consisting of the oxide of thorium; -- formerly called also thorina.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). thoria. Retrieved September 23, 2026, from http://smartdefine.org/thoria/definitions/2072205 |
| Chicago | Webster's. 2011. "thoria" http://smartdefine.org/thoria/definitions/2072205 (accessed September 23, 2026). |
| Harvard | Webster's 2011, thoria, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/thoria/definitions/2072205>. |
| MLA | Webster's. "thoria" 28 May 2011. Web. 23 September 2026. <http://smartdefine.org/thoria/definitions/2072205> |