(n.) A monument consisting of three stones; especially, such a monument forming a kind of doorway, as among the ancient Celts.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). trilithon. Retrieved September 21, 2026, from http://smartdefine.org/trilithon/definitions/2074704 |
| Chicago | Webster's. 2011. "trilithon" http://smartdefine.org/trilithon/definitions/2074704 (accessed September 21, 2026). |
| Harvard | Webster's 2011, trilithon, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/trilithon/definitions/2074704>. |
| MLA | Webster's. "trilithon" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/trilithon/definitions/2074704> |