Adjacent Words

Platina definitions

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Webster's 1828 Dictionary

PLATI'NA
PLA'TING, ppr. Overlaying with plate or with a metal; beating into thin lamens.
PLA'TING, n. The art or operation of covering any thing with plate or with a metal, particularly of overlaying a baser metal with a thin plate of silver. The coating of silver is soldered to the metal with tin or a mixture of three parts of silver with one of brass.

Merriam Webster's

noun Etymology: Spanish Date: 1750 platinum

Webster's 1913 Dictionary

Platina Plat"i*na, n. [Sp. or NL. See Platinum.] (Chem.) Platinum. Platina mohr, platinum black. Platina yellow, a pigment prepared from platinum.

Webster's 1913 Dictionary

Platinum Plat"i*num, n. [NL., fr. Sp. platina, from plata silver, LL. plata a thin plate of metal. See Plate, and cf. Platina.] (Chem.) A metallic element, intermediate in 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 acid, rarely for coin, and in the form of foil and wire for many purposes. Specific gravity 21.5. Atomic weight 194.3. 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.

Soule's Dictionary of English Synonyms

n. 1. Platinum. 2. Twisted silver-wire.