The Collaborative International Dictionary of English v.0.48:

Anathematic \A*nath`e*mat"ic\, Anathematical
\A*nath`e*mat"ic*al\, a.
   Pertaining to, or having the nature of, an anathema. --
   A*nath`e*mat"ic*al*ly, adv.
   [1913 Webster]