Palladious \Pal*la"di*ous\ (p[a^]l*l[=a]"d[i^]*[u^]s), a.
(Chem.)
Of, pertaining to, or containing, palladium; -- used
specifically to designate those compounds in which palladium
has a lower valence as compared with {palladic} compounds.
[1913 Webster]