Source : Webster's Revised Unabridged Dictionary (1913)

Langue d'oc \Langue` d'oc"\ [F., language of oc yes.]
   The dialect, closely akin to French, formerly spoken south of
   the Loire (in which the word for ``yes'' was oc); Provencal.

Source : WordNet®

Langue d'oc
     n : medieval provincial dialects of French formerly spoken in
         the south of France [syn: {Langue d'oc French}]