from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A water-soluble compound, CO(NH2)2, that is the major nitrogenous end product of protein metabolism and is the chief nitrogenous component of the urine in mammals and other organisms. Also called carbamide.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A water-soluble organic compound, CO(NH2)2, formed by the metabolism of proteins and excreted in the urine.
- n. Any N-substituted derivative of urea, with the general formula (R1R2N)CO(NR3R4).
from the GNU version of the Collaborative International Dictionary of English
- adj. 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.
from The Century Dictionary and Cyclopedia
- n. It is the most important nitrogenous waste product of the mammalian organism. It is an acid amide, its solutions presenting a neutral reaction. It can combine with acids to form crystalline, salt-like products, and is decomposed by sodium hypobromite and the hypochlorite with the liberation of carbon dioxid, nitrogen, and water. On heating the substance ammonia is given off and biuret formed.
- n. Carbamide, CO.(NH2)2, a crystalline solid, soluble in water, and forming crystalline compounds with both acids and bases.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics
CVR Partners is planning to use a portion of the proceeds from the IPO to expand production capacity of a higher-margin nitrogen fertilizer known as urea ammonium nitrate, or UAN.
To get this we need to expend large amounts of energy, i.e. fossil fuels, to pull stable nitrogen out of the air and convert it to ammonia (if the fertilizer will be sprayed) and further to urea, which is a solid granule to be spread.
The AdBlue system uses the SRC catalyst and a tank of liquid urea, which is misted into the exhaust stream.
I can cause urinary tract infections by breaking a chemical called urea into little bits.
The urine is collected by the fertilizer industry from farmyard waste and refined into pure urea, which is then sold to be used in the new engine.
And sharks, skates, and rays use a different substance: slightly salty and bitter urea, which is what animals generally turn protein waste into in order to excrete it.
In doing so, it forms a waste product called urea.
As I said earlier, ammonia, a toxic chemical produced in the intestines when we digest foods, finds its way to the liver, where it is converted to a substance called urea that can be excreted by the kidneys.
During the process, the nitrogen-containing molecules that are left are processed by the liver into urea, which is excreted by the kidneys.
This ash takes chiefly the form of a compound known as urea, which finds its way into the general circulatory system.