cationic

from WordNet (r) 3.0 (2006)

cationic
    adj 1: of or relating to cations [ant: {anionic}]

from The Collaborative International Dictionary of English v.0.48

cationic \cationic\ adj. (Chem.)
   of or pertaining to cations; having a net positive charge;
   positively ionic; -- said of ions. Contrasted with {anionic}.
   [WordNet 1.5]