Definition of urea
: a soluble weakly basic nitrogenous compound CO(NH2)2 that is the chief solid component of mammalian urine and an end product of protein decomposition, is synthesized from carbon dioxide and ammonia, and is used especially in synthesis (as of resins and plastics) and in fertilizers and animal rations
Recent Examples of urea from the Web
The instrument-cluster display announced that the urea/water fluid (which lowers the diesel’s emissions to acceptable levels) was of insufficient quality, despite the fluid having been filled at the factory.
The tank requires an occasional refill of the urea, though that’s as easy as topping off windshield wiper fluid.
Then, apply an ointment or cream that contains softening oils (like olive or jojoba), vitamin E, lactic acid, urea, hyaluronic acid, dimethicone, glycerin, lanolin, mineral oil, or petrolatum, advises the AAD.
Look for humectants that draw moisture to the top layer of your skin, like glycerin, hyaluronic acid, urea, lanolin, dimethicone, and petrolatum, says Dr. Levin.
But then Volkswagen began selling cars that passed the tighter emissions tests without using the exhaust additive, which is known as urea.
The company bid $4.23 per million British thermal units, outbidding others such as urea maker Deepak Fertilisers & Petrochemicals Corp. and state-run utility GAIL India Ltd., according to a document on the website.
But making urea takes a lot of energy, which leads to hunger — in mice, at least.
China remains the largest exporter of urea, but its share of global production fell to 39% in 2016 from 43% a year earlier.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'urea'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of urea
New Latin, from French urée, from urine
First Known Use: 1806See Words from the same year
UREA Defined for English Language Learners
Definition of urea for English Language Learners
: a substance that contains nitrogen, is found in the urine of mammals and some fish, and is used in some kinds of fertilizer
UREA Defined for Kids
Definition of urea for Students
: a compound of nitrogen that is the chief solid substance dissolved in the urine of a mammal and is formed by the breaking down of protein
Medical Definition of urea
: a soluble weakly basic nitrogenous compound CH4N2O that is the chief solid component of mammalian urine and an end product of protein decomposition and that is administered intravenously as a diuretic drug—called also carbamide
Learn More about urea
Britannica.com: Encyclopedia article about urea
Seen and Heard
What made you want to look up urea? Please tell us where you read or heard it (including the quote, if possible).