Source : Webster's Revised Unabridged Dictionary (1913)

Oscan \Os"can\, a.
   Of or pertaining to the Osci, a primitive people of Campania,
   a province of ancient Italy. -- n. The language of the Osci.

Source : WordNet®

Oscan
     n 1: an Oscan-speaking member of an ancient people of Campania
     2: an extinct Italic language of ancient southern Italy