Mid 19th century; earliest use found in Chauncy Townshend (1798–1868), poet and collector. From mesmerizable + -ity: see -bility. With form mesmerisibility compare -ibility.
Definition of mesmerizability in US English:
mesmerizability
nounˌmɛzmərʌɪzəˈbɪlɪti
rare
The capacity to be mesmerized.
Origin
Mid 19th century; earliest use found in Chauncy Townshend (1798–1868), poet and collector. From mesmerizable + -ity: see -bility. With form mesmerisibility compare -ibility.