- (n.) A thunderbolt, -- formerly believed to be a stone.
- (n.) A belemnite. See Belemnite.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). thunderstone. Retrieved September 23, 2026, from http://smartdefine.org/thunderstone/definitions/2072469 |
| Chicago | Webster's. 2011. "thunderstone" http://smartdefine.org/thunderstone/definitions/2072469 (accessed September 23, 2026). |
| Harvard | Webster's 2011, thunderstone, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/thunderstone/definitions/2072469>. |
| MLA | Webster's. "thunderstone" 28 May 2011. Web. 23 September 2026. <http://smartdefine.org/thunderstone/definitions/2072469> |