What is "palladic"

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.

a. Of or pertaining to palladium.