Source : Webster's Revised Unabridged Dictionary (1913)

Albigenses \Al`bi*gen"ses\, Albigeois \Al`bi`geois"\, n. pl.
   [From Albi and Albigeois, a town and its district in the
   south of France, in which the sect abounded.] (Eccl. Hist.)
   A sect of reformers opposed to the church of Rome in the 12th
   centuries.

   Note: The Albigenses were a branch of the Catharists (the
         pure). They were exterminated by crusades and the
         Inquisition. They were distinct from the Waldenses.