The Collaborative International Dictionary of English v.0.48:

Patavinity \Pat`a*vin"i*ty\, n. [L. patavinitas, fr. Patavium:
   cf. F. patavinit['e]]
   The use of local or provincial words, as in the peculiar
   style or diction of Livy, the Roman historian; -- so called
   from Patavium, now Padua, the place of Livy's nativity.
   [1913 Webster]