Source : Webster's Revised Unabridged Dictionary (1913)

Chthonic \Chthon"ic\, a. [Gr. ?, ?, the earth.]
   Pertaining to the earth; earthy; as, chthonic religions.

         [The] chthonic character of the wife of Zeus. --Max
                                                  M["u]ller.

Source : WordNet®

chthonic
     adj : of the underworld; "nether regions" [syn: {chthonian}, {lower},
            {nether}]