Lexic.us

Definition of Platinum

1. Noun. A heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits.

Definition of Platinum

1. n. 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.

Definition of Platinum

1. Adjective. Of a whitish grey colour, like that of the metal. ¹

2. Adjective. Of a musical recording that has sold over one million copies (for singles), or two million (for albums). ¹

3. Noun. The metallic chemical element with atomic number 78 and symbol Pt. ¹

4. Noun. A whitish grey colour, like that of the metal. ¹

¹ Source: wiktionary.com

Definition of Platinum

1. a metallic element [n -S]

Medical Definition of Platinum

1. 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 characterised 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, 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, 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. Origin: NL, fr. Sp. Platina, from plata silver, LL. Plata a thin plate of metal. See Plate, and cf. Platina. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Platinum

Literary usage of Platinum

Below you will find example usage of this term as found in modern and/or classical literature:

1. Standard methods of chemical analysis: A Manual of Analytical Methods and by Wilfred Welday Scott (1917)
"Stan nous chloride does not reduce platinum chloride to metal, ... Oxalic acid does not precipitate platinum (difference from gold). ..."

2. Journal of the American Chemical Society by American Chemical Society (1908)
"When using aqua regia to dissolve platinum, considerable difficulty was experienced ... When working with as much as 100 grams of platinum, the oft-repeated ..."

3. The Encyclopedia Americana: A Library of Universal Knowledge (1919)
"platinum is usually unaltered before the blowpipe, but it is readily fusible in the oxyhydrogen flame and in the electric arc, the melting point being about ..."

4. Analytical Chemistry by Frederick Pearson Treadwell (1921)
"platinum is found free in nature, usually accompanied by the other ... Metallic platinum is grayish white; in a finely-divided state it is grayish black. ..."

5. Journal by Royal Society of Arts (Great Britain) (1858)
"Dr. Horner estimated the amount of platinum in the gold sands of Borneo as ... The existence of platinum was afterwards confirmed by other naturalists of ..."

6. Pharmaceutical Journal by Pharmaceutical Society of Great Britain (1859)
"SEVERAL authors on the statistics of metal mention Borneo as a source of the valuable metal platinum, so much required in the chemical and industrial arts. ..."

7. Abstracts of the Papers Printed in the Philosophical Transactions of the by Royal Society (Great Britain) (1833)
"On some Combinations of platinum. By Edmund Davy, Esq. Professor of ... The principal object of this paper is to describe a peculiar compound of platinum, ..."

8. Standard methods of chemical analysis: A Manual of Analytical Methods and by Wilfred Welday Scott (1917)
"Stan nous chloride does not reduce platinum chloride to metal, ... Oxalic acid does not precipitate platinum (difference from gold). ..."

9. Journal of the American Chemical Society by American Chemical Society (1908)
"When using aqua regia to dissolve platinum, considerable difficulty was experienced ... When working with as much as 100 grams of platinum, the oft-repeated ..."

10. The Encyclopedia Americana: A Library of Universal Knowledge (1919)
"platinum is usually unaltered before the blowpipe, but it is readily fusible in the oxyhydrogen flame and in the electric arc, the melting point being about ..."

11. Analytical Chemistry by Frederick Pearson Treadwell (1921)
"platinum is found free in nature, usually accompanied by the other ... Metallic platinum is grayish white; in a finely-divided state it is grayish black. ..."

12. Journal by Royal Society of Arts (Great Britain) (1858)
"Dr. Horner estimated the amount of platinum in the gold sands of Borneo as ... The existence of platinum was afterwards confirmed by other naturalists of ..."

13. Pharmaceutical Journal by Pharmaceutical Society of Great Britain (1859)
"SEVERAL authors on the statistics of metal mention Borneo as a source of the valuable metal platinum, so much required in the chemical and industrial arts. ..."

14. Abstracts of the Papers Printed in the Philosophical Transactions of the by Royal Society (Great Britain) (1833)
"On some Combinations of platinum. By Edmund Davy, Esq. Professor of ... The principal object of this paper is to describe a peculiar compound of platinum, ..."

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