Source : Webster's Revised Unabridged Dictionary (1913)

Ureameter \U`re*am"e*ter\, n. [Urea + -meter.] (Physiol. Chem.)
   An apparatus for the determination of the amount of urea in
   urine, in which the nitrogen evolved by the action of certain
   reagents, on a given volume of urine, is collected and
   measured, and the urea calculated accordingly.