(n.) Silicon dioxide, SiO/. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). silica. Retrieved September 22, 2026, from http://smartdefine.org/silica/definitions/2062017 |
| Chicago | Webster's. 2011. "silica" http://smartdefine.org/silica/definitions/2062017 (accessed September 22, 2026). |
| Harvard | Webster's 2011, silica, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/silica/definitions/2062017>. |
| MLA | Webster's. "silica" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/silica/definitions/2062017> |