langue d'oc [läng dō̂k′]
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a group of French dialects spoken in medieval S France and surviving in Provençal
Origin: Fr, literally , language of oc (from Prov, yes from Classical Latin hoc, this thing): from characteristic use of oc for affirmation (in contrast to langue d'oïl)
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The Romance language formerly spoken in and around Provence and Roussillon, developing into Provençal.
Origin: French, from Old French : langue, language; see language + de, of (from Latin dē; see de-) + Old Provençal oc, yes; see Occitan.