See Also: Platinum(medicine)
platinum(encyclopedia)
platinum(dictionary)
PLATINUM(finance)
platinum(dictionary)
Eastern Platinum(finance)
platinum blonde(dictionary)
platinum compounds(medicine)
platinum foil(medicine)
Southern Platinum(finance)

platinum (iou)



platinum noun & adjective. E19.
[Alt. of PLATINA after other metals in -um.]
A. noun.
A rare silvery heavy metal which is a chemical element of the transition series, atomic no. 78, is relatively inert with a very high melting point, and is used in jewellery, as a catalyst, etc. (Symbol Pt.) E19.
A greyish-white or silvery colour like that of platinum. E20.
Phrases: go platinum (of a recording) achieve sales meriting a platinum disc.
b. attrib. or as adjective.
Made of platinum, consisting of platinum. M19.
Of the colour of platinum, greyish-white, silvery. M20.
Comb. & special collocations: platinum-black a black powder consisting of finely divided platinum; platinum blond, platinum blonde adjective & noun (a) adjective (of the hair) silvery-blond in colour; (of a person) having silvery-blond hair; (b) noun a person, esp. a woman, with platinum-blond hair; platinum-blue any of a class of dark blue polymeric complexes formed by divalent platinum with amide ligands; platinum disc a framed platinum disc awarded to a recording artist or group for sales of a recording of at least a million; platinum group: comprising the platinum metals; platinum metals a group of similar metallic elements of the transition series often associated in ores, comprising platinum, iridium, palladium, osmium, rhodium, and ruthenium; platinum sponge a grey spongy amorphous form of platinum obtained on heating ammonium chloroplatinate and used as a catalyst.