(n.) A nail one or two inches long, of iron, brass, tin or tinner iron, with a hole through the flattened head, used to mark stations in underground surveying.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). spad. Retrieved September 30, 2026, from http://smartdefine.org/spad/definitions/2064343 |
| Chicago | Webster's. 2011. "spad" http://smartdefine.org/spad/definitions/2064343 (accessed September 30, 2026). |
| Harvard | Webster's 2011, spad, Smart Define, viewed 30 September, 2026, <http://smartdefine.org/spad/definitions/2064343>. |
| MLA | Webster's. "spad" 28 May 2011. Web. 30 September 2026. <http://smartdefine.org/spad/definitions/2064343> |