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platinum
[ plat-n-uhm, plat-nuhm ]
noun
- Chemistry. a heavy, grayish-white, highly malleable and ductile metallic element, resistant to most chemicals, practically unoxidizable except in the presence of bases, and fusible only at extremely high temperatures: used for making chemical and scientific apparatus, as a catalyst in the oxidation of ammonia to nitric acid, and in jewelry. : Pt; : 195.09; : 78; : 21.5 at 20°C.
- a light, metallic gray with very slight bluish tinge when compared with silver.
adjective
- made of platinum.
- (of an audio recording) having sold a minimum of one million copies.
platinum
/ ˈæɪə /
noun
- a ductile malleable silvery-white metallic element, very resistant to heat and chemicals. It occurs free and in association with other platinum metals, esp in osmiridium: used in jewellery, laboratory apparatus, electrical contacts, dentistry, electroplating, and as a catalyst. Symbol: Pt; atomic no: 78; atomic wt: 195.08; valency: 1–4; relative density: 21.45; melting pt: 1769°C; boiling pt: 3827±100°C
- a medium to light grey colour
- ( as adjective )
a platinum carpet
platinum
/ ă′-ə /
- A soft, ductile, malleable, silver-white metallic element that usually occurs with osmium, iridium, palladium, or nickel. It has a high melting point and does not corrode in air. Platinum is used as a catalyst and in making jewelry, electrical contacts, and dental crowns. Atomic number 78; atomic weight 195.08; melting point 1,772°C; boiling point 3,827°C; specific gravity 21.45; valence 2, 3, 4.
- See Periodic Table
51Թ History and Origins
51Թ History and Origins
Origin of platinum1
Example Sentences
Although it received some of the best reviews of his career, it was his first album not to go platinum in the UK.
"This risked giving consumers the misleading impression that platinum tickets were better," it said in an update to its investigation into Ticketmaster.
New York Times fashion director Vanessa Friedman declared that Donatella "wore her struggles - with personal tragedy, self-doubt, finding her creative feet, and drugs - with as much aplomb as her long platinum hair".
Versace is also an embodiment of the fashion house she has built - always seen in brightly coloured prints that are synonymous with the brand and platinum blonde hair that means she always stands out.
Catalytic converter theft is a growing problem in Southern California, as thieves target the emission-control devices for high-value metals such as platinum, palladium and rhodium.
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