(n.) A very light porous volcanic scoria, usually of a gray color, the pores of which are capillary and parallel, giving it a fibrous structure. It is supposed to be produced by the disengagement of watery vapor without liquid or plastic lava. It is much used, especially in the form of powder, for smoothing and polishing. Called also pumice stone.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). pumice. Retrieved September 24, 2026, from http://smartdefine.org/pumice/definitions/2050897 |
| Chicago | Webster's. 2011. "pumice" http://smartdefine.org/pumice/definitions/2050897 (accessed September 24, 2026). |
| Harvard | Webster's 2011, pumice, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/pumice/definitions/2050897>. |
| MLA | Webster's. "pumice" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/pumice/definitions/2050897> |