(a.) Having two foci, as some spectacle lenses.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). bifocal. Retrieved September 23, 2026, from http://smartdefine.org/bifocal/definitions/1980186 |
| Chicago | Webster's. 2011. "bifocal" http://smartdefine.org/bifocal/definitions/1980186 (accessed September 23, 2026). |
| Harvard | Webster's 2011, bifocal, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/bifocal/definitions/1980186>. |
| MLA | Webster's. "bifocal" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/bifocal/definitions/1980186> |