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Webster 1913 Edition
Urea
U′re-a
,Adj.
[NL. See
Urine
.] (Physiol. Chem.)
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.
☞ It is the main product of the regressive metamorphosis (katabolism) of proteid matter in the body, and is excreted daily to the amount of about 500 grains by a man of average weight. Chemically it is carbamide,
CO(NH2)2
, and when heated with strong acids or alkalies is decomposed into carbonic acid and ammonia. It unites with acids to form salts, as nitrate of urea, and it can be made synthetically from ammonium cyanate, with which it is isomeric. Urea ferment
, a soluble ferment formed by certain bacteria, which, however, yield the ferment from the body of their cells only after they have been killed by alcohol. It causes urea to take up water and decompose into carbonic acid and ammonia. Many different bacteria possess this property, especially
Bacterium ureae
and Micrococcus ureae
, which are found abundantly in urines undergoing alkaline fermentation.Webster 1828 Edition
Urea
U'REA
,Noun.
Definition 2024
urea
urea
English
Noun
urea (countable and uncountable, plural ureas)
- (biochemistry, uncountable) A water-soluble organic compound, CO(NH2)2, formed by the metabolism of proteins and excreted in the urine.
- (chemistry, countable) Any N-substituted derivative of urea, with the general formula (R1R2N)CO(NR3R4).
Synonyms
Derived terms
See also
Translations
organic compound
Finnish
Noun
urea
Declension
| Inflection of urea (Kotus type 12/kulkija, no gradation) | |||
|---|---|---|---|
| nominative | urea | ureat | |
| genitive | urean | ureoiden ureoitten |
|
| partitive | ureaa | ureoita | |
| illative | ureaan | ureoihin | |
| singular | plural | ||
| nominative | urea | ureat | |
| accusative | nom. | urea | ureat |
| gen. | urean | ||
| genitive | urean | ureoiden ureoitten ureainrare |
|
| partitive | ureaa | ureoita | |
| inessive | ureassa | ureoissa | |
| elative | ureasta | ureoista | |
| illative | ureaan | ureoihin | |
| adessive | urealla | ureoilla | |
| ablative | urealta | ureoilta | |
| allative | urealle | ureoille | |
| essive | ureana | ureoina | |
| translative | ureaksi | ureoiksi | |
| instructive | — | ureoin | |
| abessive | ureatta | ureoitta | |
| comitative | — | ureoineen | |