(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 22, 2026, from http://smartdefine.org/urea/definitions/2078238 |
| Chicago | Webster's. 2011. "urea" http://smartdefine.org/urea/definitions/2078238 (accessed September 22, 2026). |
| Harvard | Webster's 2011, urea, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/urea/definitions/2078238>. |
| MLA | Webster's. "urea" 28 May 2011. Web. 22 September 2026. <http://smartdefine.org/urea/definitions/2078238> |