Any enzyme that catalyses the hydrolysis of a nucleoside into its constituent base and sugar. Also: any of various other enzymes involved in the catabolism of nucleosides or nucleoside-containing compounds.
Origin
Early 20th century. From nucleoside + -ase.
Definition of nucleosidase in US English:
nucleosidase
noun
Biochemistry
Any enzyme that catalyses the hydrolysis of a nucleoside into its constituent base and sugar. Also: any of various other enzymes involved in the catabolism of nucleosides or nucleoside-containing compounds.