Source : Webster's Revised Unabridged Dictionary (1913)

Cankerous \Can"ker*ous\, a.
   Affecting like a canker. ``Canrerous shackles.'' --Thomson.

         Misdeem it not a cankerous change.       --Wordsworth.

Source : WordNet®

cankerous
     adj : having an ulcer or canker [syn: {ulcerated}, {ulcerous}]