nucleosidase

noun

nu·​cle·​o·​sid·​ase ˌn(y)ü-klē-ə-ˈsī-ˌdās, -ˌdāz 

1

: an enzyme that promotes the hydrolysis of a nucleoside

2

: a phosphorylase that promotes reversibly the reaction of a nucleoside with phosphate forming a base and a phosphate of ribose or deoxyribose

called also nucleoside phosphorylase