(n.) Any one of several substances or mixtures which phosphoresce or ignite spontaneously on exposure to air, as a heated mixture of alum, potash, and charcoal or a mixture of charcoal and finely divided lead.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). pyrophorus. Retrieved September 26, 2026, from http://smartdefine.org/pyrophorus/definitions/2051426 |
| Chicago | Webster's. 2011. "pyrophorus" http://smartdefine.org/pyrophorus/definitions/2051426 (accessed September 26, 2026). |
| Harvard | Webster's 2011, pyrophorus, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/pyrophorus/definitions/2051426>. |
| MLA | Webster's. "pyrophorus" 27 May 2011. Web. 26 September 2026. <http://smartdefine.org/pyrophorus/definitions/2051426> |