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See Platen.

Platinum. Platina mohr, platinum black. -- Platina yellow, a pigment prepared from platinum.

The art or process of covering anything with a plate or plates, or with metal, particularly of overlaying a base or dull metal with a thin plate of precious or bright metal, as by mechanical means or by electro-magnetic deposition.

Of, pertaining to, or containing, platinum; -- used specifically to designate those compounds in which the element has a higher valence, as contrasted with the platinous compounds; as, platinic chloride (PtCl4).

Of, pertaining to, or designating, an acid consisting of platinic chloride and hydrochloric acid, and obtained as a brownish red crystalline substance, called platinichloric, or chloroplatinic, acid.

Yielding platinum; as, platiniferous sand.

A natural alloy of platinum and iridium occurring in grayish metallic rounded or cubical grains with platinum.

To cover or combine with platinum.

Pertaining to, derived from, or designating, an acid consisting of platinous chloride and hydrochloric acid, called platinochloric, or chloroplatinous, acid.

A double chloride of platinum and some other metal or radical; a salt of platinochloric acid.

Pertaining to, derived from, or designating, an acid compound of platinous cyanide and hydrocyanic acid. It is obtained as a cinnaber-red crystalline substance.

A double cyanide of platinum and some other metal or radical; a salt of platinocyanic acid.

A cathode. [R.]

Resembling platinum.

A permanent photographic picture or print in platinum black.

Of, pertaining to, or containing, platinum; -- used specifically to designate those compounds in which the element has a lower valence, as contrasted with the platinic compounds; as, platinous chloride (PtCl2).

value between silver and gold, occurring native or alloyed with other metals, also as the platinum arsenide (sperrylite). It is heavy tin-white metal which is ductile and malleable, but very infusible, and characterized by its resistance to strong chemical reagents. It is used for crucibles, for stills for sulphuric ac…

See Platinichloric.

The art or process of depositing a coating (commonly) of silver, gold, or nickel on an inferior metal, by means of electricity.

, colorless, inflammable liquid from the slow oxidation of alcohol under the influence of platinum black.