The Collaborative International Dictionary of English v.0.48:

Cobaltic \Co*balt"ic\ (?; 74), a. [Cf. F. cobaltique.] (Chem.)
   Pertaining to, derived from, or containing, cobalt; -- said
   especially of those compounds in which cobalt has higher
   valence; as, cobaltic oxide.
   [1913 Webster]

   Luteo-cobaltic compounds (Chem.), an extensive series of
      complex yellow compounds of ammonia and cobaltic salts.

   Roseo-cobaltic compounds (Chem.), an extensive series of
      complex red compounds of cobalt and ammonia. Modifications
      of these are the purpureo-cobaltic compounds.
      [1913 Webster]