\U"rine\, n. [F. urine, L. urina; akin to urinari to
plunge under water, to dive, Gr. ? urine; cf. Skr. v[=a]r
water, Icel. ?r drizzling rain, AS. w[ae]r the sea.]
(Physiol.)
In mammals, a fluid excretion from the kidneys; in birds and
reptiles, a solid or semisolid excretion.
Note: In man, the urine is a clear, transparent fluid of an
      amber color and peculiar odor, with an average density
      of 1.02. The average amount excreted in 24 hours is
      from 40 to 60 ounces (about 1,200 cubic centimeters).
      Chemically, the urine is mainly an aqueous solution of
      urea, salt (sodium chloride), and uric acid, together
      with some hippuric acid and peculiar pigments. It
      usually has an acid reaction, owing to the presence of
      acid phosphates of soda or free uric acid. Normally, it
      contains about 960 parts of water to 40 parts of solid
      matter, and the daily average excretion is 35 grams
      (540 grains) of urea, 0.75 gram (11 grains) of uric
      acid, and 16.5 grams (260 grains) of salt. Abnormally,
      it may contain sugar as in diabetes, albumen as in
      Bright's disease, bile pigments as in jaundice, or
      abnormal quantities of some one or more of the normal
      constituents.

\U"rine\, v. i.
To urinate. [Obs.] --Bacon.