aspartase
noun
as·par·tase
| \ ə-ˈspär-ˌtās, -ˌtāz
\
\
Medical Definition of aspartase
: an enzyme that occurs in various bacteria, yeasts, and higher plants and that catalyzes the conversion reaction of aspartic acid to fumaric acid by the removal of ammonia and also the reverse reaction of the addition of ammonia to fumaric acid