Source : Webster's Revised Unabridged Dictionary (1913)

Cauterant \Cau"ter*ant\, n.
   A cauterizing substance.

Source : WordNet®

cauterant
     n : an instrument or substance used to destroy tissue for
         medical reasons (eg removal of a wart) by burning it with
         a hot iron or an electric current or a caustic or by
         freezing it [syn: {cautery}]