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which affords effectual protection or security; a sateguard; as, the trial by jury is the palladium of our civil rights. Blackstone.

To cover or coat with palladium. [R.]

ed shield of the Romans, said to have-fallen from heaven in the reign of Numa. It was the palladium of Rome.

n and retain; to absorb; -- said especially with respect to gases; as iron, platinum, and palladium occlude large volumes of hydrogen.

of gases (Chem. & Physics), the phenomenon of absorbing gases, as exhibited by platinum, palladium, iron, or charcoal; thus, palladium absorbs, or occludes, nearly a thousand times its own volume of hydrogen, and in this case a chemical compound seems to be formed.

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.

Of, pertaining to, or containing, palladium; -- used specifically to designate those compounds in which palladium has a lower valence as compared with palladic compounds.

semble platinum. These consist of the light platinum group, viz., rhodium, ruthenium, and palladium, whose specific gravities are about 12; and the heavy platinum group, viz., osmium, iridium, and platinum, whose specific gravities are over 21. -- Platinum sponge (Chem.), metallic platinum in a gray, porous, spongy fo…