[yoo r-ee-eys, -eyz]

noun Biochemistry.

an enzyme that changes urea into ammonium carbonate, occurring in bacteria, fungi, etc.

Origin of urease

First recorded in 1895–1900; ure(a) + -ase
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for urease



an enzyme occurring in many plants, esp fungi, that converts urea to ammonium carbonate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

urease in Medicine


[yurē-ās′, -āz′]


An enzyme that cataylzes the hydrolysis of urea to form ammonium carbonate.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.