Word:

Platinum

Plat´i`num
n.1.(Chem.) A metallic element of atomic number 78, one of the noble metals, classed with silver and gold as a precious metal, occurring native or alloyed with other metals and also as the platinum arsenide (sperrylite). It is a heavy tin-white metal which is ductile and malleable, but very infusible (melting point 1772° C), and characterized by its resistance to strong chemical reagents. It is used for crucibles in laboratory operations, as a catalyst, in jewelry, for stills for sulphuric acid, rarely for coin, and in the form of foil and wire for many purposes. Specific gravity 21.5. Atomic weight 195.1. Symbol Pt. Formerly called platina.
Platinum black
(Chem.) a soft, dull black powder, consisting of finely divided metallic platinum obtained by reduction and precipitation from its solutions. It absorbs oxygen to a high degree, and is employed as an oxidizer.
Platinum lamp
(Elec.) a kind of incandescent lamp of which the luminous medium is platinum. See under Incandescent.
Platinum metals
(Chem.) the group of metallic elements which in their chemical and physical properties resemble 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 form, obtained by reducing the double chloride of platinum and ammonium. It absorbs oxygen, hydrogen, and certain other gases, to a high degree, and is employed as an agent in oxidizing.
Noun1.Platinumplatinum - a heavy precious metallic element; gray-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits
Synonyms: atomic number 78, Pt
atomic number 78, noble metal, Pt
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Platina mohr
Platina yellow
Plating
Platinic
Platinichloric
Platiniferous
Platiniridium
Platinize
Platinochloric
Platinochloride
Platinocyanic
Platinocyanide
Platinode
Platinoid
Platinotype
Platinous
-- Platinum --
platinum black
Platinum lamp
Platinum metals
Platinum sponge
platinum thermometer
platinum-blonde
platinum-iridium
Platitude
platitudinal
Platitudinarian
Platitudinize
Platitudinous
Platly
Platness
Plato
Plato's Academy
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