UREASE Meaning of UREASE in English /yoor"ee ays', -ayz'/ , n. Biochem.an enzyme that changes urea into ammonium carbonate, occurring in bacteria, fungi, etc. [ 1895-1900; URE(A) + -ASE ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012