Definition of referability in English:
referability
(also referrability)
noun ˌrɛf(ə)rəˈbɪlɪtirɪˌfəːrəˈbɪlɪti
The fact or quality of being referable.
Origin
Mid 19th century; earliest use found in James Tennent (1804–1869), traveller and politician. From referable + -ility: see -bility.