(n.) Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See Feldspar.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). orthoclase. Retrieved September 28, 2026, from http://smartdefine.org/orthoclase/definitions/2039560 |
| Chicago | Webster's. 2011. "orthoclase" http://smartdefine.org/orthoclase/definitions/2039560 (accessed September 28, 2026). |
| Harvard | Webster's 2011, orthoclase, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/orthoclase/definitions/2039560>. |
| MLA | Webster's. "orthoclase" 27 May 2011. Web. 28 September 2026. <http://smartdefine.org/orthoclase/definitions/2039560> |