(n.) A rare nonmetallic element found in certain minerals, as tantalite, samarskite, and fergusonite, and isolated as a dark powder which becomes steel-gray by burnishing. Symbol Ta. Atomic weight 182.0. Formerly called also tantalium.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). tantalum. Retrieved September 29, 2026, from http://smartdefine.org/tantalum/definitions/2070379 |
| Chicago | Webster's. 2011. "tantalum" http://smartdefine.org/tantalum/definitions/2070379 (accessed September 29, 2026). |
| Harvard | Webster's 2011, tantalum, Smart Define, viewed 29 September, 2026, <http://smartdefine.org/tantalum/definitions/2070379>. |
| MLA | Webster's. "tantalum" 28 May 2011. Web. 29 September 2026. <http://smartdefine.org/tantalum/definitions/2070379> |