- (n.) A granular, crystalline, ingeous rock composed of orthoclase and hornblende, the latter often replaced or accompanied by pyroxene or mica. Syenite sometimes contains nephelite (elaeolite) or leucite, and is then called nephelite (elaeolite) syenite or leucite syenite.
- (n.) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called granite.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). syenite. Retrieved September 25, 2026, from http://smartdefine.org/syenite/definitions/2069551 |
| Chicago | Webster's. 2011. "syenite" http://smartdefine.org/syenite/definitions/2069551 (accessed September 25, 2026). |
| Harvard | Webster's 2011, syenite, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/syenite/definitions/2069551>. |
| MLA | Webster's. "syenite" 28 May 2011. Web. 25 September 2026. <http://smartdefine.org/syenite/definitions/2069551> |