The Collaborative International Dictionary of English v.0.48:

Palladic \Pal*la"dic\ (p[a^]l*l[=a]"d[i^]k or
   p[a^]l*l[a^]d"[i^]k), a. (Chem.)
   Of, pertaining to, or derived from, palladium; -- used
   specifically to designate those compounds in which the
   element has a higher valence as contrasted with palladious
   compounds.
   [1913 Webster]