Source : Webster's Revised Unabridged Dictionary (1913)

Citole \Cit"ole\, n. [OF. citole, fr. L. cithara. {See
   Cittern}.] (Mus.)
   A musical instrument; a kind of dulcimer. [Obs.]

Source : WordNet®

citole
     n : a 16th century musical instrument resembling a guitar with a
         pear-shaped soundbox and wire strings [syn: {cittern}, {cithern},
          {cither}, {gittern}]