- (n.) Sugar of milk or milk sugar; a crystalline sugar present in milk, and separable from the whey by evaporation and crystallization. It has a slightly sweet taste, is dextrorotary, and is much less soluble in water than either cane sugar or glucose. Formerly called lactin.
- (n.) See Galactose.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). lactose. Retrieved September 22, 2026, from http://smartdefine.org/lactose/definitions/2026162 |
| Chicago | Webster's. 2011. "lactose" http://smartdefine.org/lactose/definitions/2026162 (accessed September 22, 2026). |
| Harvard | Webster's 2011, lactose, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/lactose/definitions/2026162>. |
| MLA | Webster's. "lactose" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/lactose/definitions/2026162> |