: 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
Examples of urea in a Sentence
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Types of humectants include hyaluronic acid, glycerin, urea, and aloe vera.12
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Angelica Bottaro, Verywell Health, 4 June 2025
The urea cycle disorder can eventually lead to a toxic accumulation of ammonia in the bloodstream.
—Sara Hashemi, Smithsonian Magazine, 19 May 2025
It’s formulated with retinol and AHA, two ingredients dermatologists recommend for targeting texture on your body—along with deeply hydrating, barrier-supporting ingredients like shea butter and urea.
—Sarah Y. Wu, Glamour, 13 May 2025
The metabolic condition, called carbamoyl-phosphate synthetase 1 deficiency, affects the urea cycle and can cause deadly levels of ammonia to build up in the blood, leading to severe and permanent brain damage.
—Keerthana Pakanati, ABC News, 15 May 2025
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Angelica Bottaro, Verywell Health, 4 June 2025
The urea cycle disorder can eventually lead to a toxic accumulation of ammonia in the bloodstream.
—Sara Hashemi, Smithsonian Magazine, 19 May 2025
It’s formulated with retinol and AHA, two ingredients dermatologists recommend for targeting texture on your body—along with deeply hydrating, barrier-supporting ingredients like shea butter and urea.
—Sarah Y. Wu, Glamour, 13 May 2025
The metabolic condition, called carbamoyl-phosphate synthetase 1 deficiency, affects the urea cycle and can cause deadly levels of ammonia to build up in the blood, leading to severe and permanent brain damage.
—Keerthana Pakanati, ABC News, 15 May 2025
See All Example Sentences for urea
Cite this Entry
“Urea.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/urea. Accessed 8 Jul. 2025.
Copy CitationKids Definition
urea
noun
: a soluble nitrogen-containing compound that is the chief solid substance in the urine of mammals and is an end product of protein breakdown
Medical Definition
urea
noun
: 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
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