PLATINUM
\plˈatɪnəm], \plˈatɪnəm], \p_l_ˈa_t_ɪ_n_ə_m]\
Definitions of PLATINUM
- 2006 - WordNet 3.0
- 2011 - English Dictionary Database
- 1919 - The Winston Simplified Dictionary
- 1898 - Warner's pocket medical dictionary of today.
- 1894 - The Clarendon dictionary
- 1919 - The Concise Standard Dictionary of the English Language
- 1846 - Medical lexicon: a dictionary of medical science
- 1898 - American pocket medical dictionary
- 1916 - Appleton's medical dictionary
- 1871 - The Cabinet Dictionary of the English Language
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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
By Princeton University
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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
By DataStellar Co., Ltd
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A heavy, silver-white precious metal, hard to melt or resolve, but capable of being hammered or pressed thin.
By William Dodge Lewis, Edgar Arthur Singer
By William R. Warner
By William Hand Browne, Samuel Stehman Haldeman
By James Champlin Fernald
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The preparations of platinum resemble in their therapeutical properties those of gold. The BICHLO'RIDE, Plat'ini Bichlo'ridum, made by dissolving platinum in aqua regia, and the DOUBLE CHLORIDE of PLATINUM and SODIUM, So'dii chloroplat'-inas, Chloroplat'inate of sodium, prepared by dissolving bichloride of platinum and pure chloride of sodium, in proper proportions, in water, evaporating and crystallizing, - are the preparations used. . They are not much prescribed.
By Robley Dunglison
By Willam Alexander Newman Dorland
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A metallic element. It is a soft, ductile, and very malleable white metal, which is infusible at all temperatures ordinarily obtainable, but melts in the oxyhydrogen flame. It is very heavy, its sp.gr. being 21.5. Spongy p. is a porous mass obtained by heating chlorid of p. and ammonium. P. black is very finely divided metallic p., forming a soft black powder. P. has a marked capacity for absorbing hydrogen and for condensing oxygen upon its surface, and this property is especially pronounced in the case of the two varieties just described. P. is not oxidizable by exposure to air, oxygen, or water. It is not attacked by nitric acid, but is dissolved by aqua regis. It is attacked by the alkalis and alkaline cyanids and by potassium nitrate. It forms with several metals alloys which are fusible at temperatures much below its own melting point. In composition it acts partly as a dyad, forming platinous salts, partly as a tetrad, forming platinic salts. Symbol, Pt; atomic weight, 195.
By Smith Ely Jelliffe
