langue d'oïllangue d'o·ïl
a group of French dialects spoken in most of central and N France in the Middle Ages: it is the Old French from which modern French is derived
Origin of langue d'oïlFr, literally , language of oïl ( from OFr, yes from Late Latin hoc illi from Classical Latin hoc, this + ille, that): from characteristic use of oïl (Fr oui) for affirmation: compare langue d'oc
The Romance language of medieval France north of the Loire River, on which modern French is based.
Origin of langue d'oilFrench from Old French langue language ; see language . de of ; see langue d'oc . oil yes ( ultimately from Latin hoc ille (fēcit) he (did) this ) ( hoc this ; see Occitan . ) ( ille he ; see al-1 in Indo-European roots.)