platinum black definition, platinum black meaning | English dictionary

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platinum black

  

      n     (Chem)   a black powder consisting of very finely divided platinum metal. It is used as a catalyst, esp. in hydrogenation reactions  
English Collins Dictionary - English Definition & Thesaurus  
Collins
platinum  
      n  
1    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  
2   
a    a medium to light grey colour  
b    (as adj)  
a platinum carpet     
     (C19: New Latin, from platina, on the model of other metals with the suffix -um)  


platinum black  
      n     (Chem)   a black powder consisting of very finely divided platinum metal. It is used as a catalyst, esp. in hydrogenation reactions  
platinum-blond   ,   (fem.)   platinum-blonde  
      adj  
1    (of hair) of a pale silver-blond colour  
2   
a    having hair of this colour  
b    (as n)  
she was a platinum blonde     
platinum disc  
      n  
a    (in Britain) an album certified to have sold 300000 copies or a single certified to have sold 600000 copies  
b    (in the U.S.) an album or single certified to have sold one million copies  
   Compare       gold disc       silver disc  
platinum metal  
      n   any of the group of precious metallic elements consisting of ruthenium, rhodium, palladium, osmium, iridium, and platinum  

English Collins Dictionary - English Definition & Thesaurus  

Collaborative Dictionary     English Definition
n.
police van in which prisoners are transported from the police stations to the jails
slang term
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