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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.
A substance obtained from urine.

Definition 2024


urea

urea

English

Noun

urea (countable and uncountable, plural ureas)

  1. (biochemistry, uncountable) A water-soluble organic compound, CO(NH2)2, formed by the metabolism of proteins and excreted in the urine.
  2. (chemistry, countable) Any N-substituted derivative of urea, with the general formula (R1R2N)CO(NR3R4).

Synonyms

Derived terms

See also

Translations


Finnish

Noun

urea

  1. 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

Synonyms


Italian

Noun

urea f (plural uree)

  1. urea

Derived terms

Anagrams


Spanish

Noun

urea f (plural ureas)

  1. urea