(a.) A very soluble crystalline body which is the chief constituent of the urine in mammals and some other animals. It is also present in small quantity in blood, serous fluids, lymph, the liver, etc.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). Urea. Retrieved September 27, 2026, from http://smartdefine.org/urea/definitions/2078238 |
| Chicago | Webster's. 2011. "Urea" http://smartdefine.org/urea/definitions/2078238 (accessed September 27, 2026). |
| Harvard | Webster's 2011, Urea, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/urea/definitions/2078238>. |
| MLA | Webster's. "Urea" 28 May 2011. Web. 27 September 2026. <http://smartdefine.org/urea/definitions/2078238> |