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  platinum
  Symbol: Pt
  Atomic number: 78
  Atomic weight: 195.078
  Attractive greyish-white metal. When pure, it is malleable and ductile.
  Does not oxidize in air, insoluble in hydrochloric and nitric acid.
  Corroded by halogens, cyandies, sulphur and alkalis. Hydrogen and
  oxygen react explosively in the presence of platinum. There are six
  stable isotopes and three radioisotopes, the most stable being Pt-193
  with a half-life of 60 years. Platinum is used in jewelry, laboratory
  equipment, electrical contacts, dentistry, and anti-pollution devices in
  cars. PtCl2(NH3)2 is used to treat some forms of cancer. Platinum-{cobalt
  alloys have magnetic properties. It is also used in the definition of
  the Standard Hydrogen Electrode. Discovered by Antonio de Ulloa in South
  America in 1735. The name comes from the Spanish word platina which means
  silver. Platinum metal is generally not a health concern due to its
  unreactivity, however platinum compounds should be considered highly
  toxic.
  
  

  Platinum, AK (city, FIPS 61080)
    Location: 58.97394 N, 161.72523 W
    Population (1990): 64 (45 housing units)
    Area: 115.4 sq km (land), 0.0 sq km (water)
    Zip code(s): 99651

  Platinum \Plat"i*num\, n. [NL., fr. Sp. platina, from plata
     silver, LL. plata a thin plate of metal. See Plate, and cf.
     Platina.] (Chem.)
     A metallic element of atomic number 78, one of the noble
     metals, classed with silver and gold as a precious metal,
     occurring native or alloyed with other metals and also as the
     platinum arsenide (sperrylite). It is a heavy tin-white metal
     which is ductile and malleable, but very infusible (melting
     point 1772[deg] C), and characterized by its resistance to
     strong chemical reagents. It is used for crucibles in
     laboratory operations, as a catalyst, in jewelry, 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 195.1. Symbol Pt. Formerly called platina.
     [1913 Webster +PJC]
  
     Platinum black (Chem.), 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 (Elec.), a kind of incandescent lamp of which
        the luminous medium is platinum. See under Incandescent.
        
  
     Platinum metals (Chem.), the group of metallic elements
        which in their chemical and physical properties resemble
        platinum. These consist of the light platinum group, viz.,
        rhodium, ruthenium, and palladium, whose specific
        gravities are about 12; and the heavy platinum group,
        viz., osmium, iridium, and platinum, whose specific
        gravities are over 21.
  
     Platinum sponge (Chem.), 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.
        [1913 Webster]

  Platinum \Plat"i*num\, n. [NL., fr. Sp. platina, from plata
     silver, LL. plata a thin plate of metal. See Plate, and cf.
     Platina.] (Chem.)
     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.
  
     Platinum black (Chem.), 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 (Elec.), a kind of incandescent lamp of which
        the luminous medium is platinum. See under Incandescent.
        
  
     Platinum metals (Chem.), the group of metallic elements
        which in their chemical and physical properties resemble
        platinum. These consist of the light platinum group, viz.,
        rhodium, ruthenium, and palladium, whose specific
        gravities are about 12; and the heavy platinum group,
        viz., osmium, iridium, and platinum, whose specific
        gravities are over 21.
  
     Platinum sponge (Chem.), 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.

  platinum
       n : 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 [syn: Pt, atomic
           number 78]

  platinum
     Αγγλικά n.
     λευκόχρυσος

  platinum
     a.
     1 Of a whitish grey colour, like that of the metal.
     2 Of a musical recording that has sold over one million copies (for
  singles), or two million (for albums).
     3 Very expensive, or of very high quality
     n.
     1 (senseid en chemical element 78, Pt) The chemical element with
  atomic number 78 and symbol Pt; a dense, malleable, ductile, highly
  unreactive, silverish-white transition metal of great value.
     2 (senseid en whitish grey color) A whitish grey colour, like that of
  the metal.
     3 (senseid en recording with huge sales) (lb en music) A single or
  album that has achieved platinum sales, i.e. over 1 million or 2
  million.
     4 (senseid en platin-class drug) {lb|en|medicine|sometimes, (l en
  ellipsis#Noun elliptically)} A platinum-based drug: a (l en
  platin#Etymology 2).
     vb.
     (lb en computer games) to reach platinum level in a game
     Latin n.
     (l en platinum)
     Malay alt.
     (l id platina) (q: Indonesia)
     Malay n.
     (l en platinum)

  platinum
     a.
     1 Of a whitish grey colour, like that of the metal.
     2 Of a musical recording that has sold over one million copies (for
  singles), or two million (for albums).
     3 Very expensive, or of very high quality
     n.
     1 (senseid en chemical element 78, Pt) The chemical element with
  atomic number 78 and symbol Pt; a dense, malleable, ductile, highly
  unreactive, silverish-white transition metal of great value.
     2 (senseid en whitish grey color) A whitish grey colour, like that of
  the metal.
     3 (senseid en recording with huge sales) (lb en music) A single or
  album that has achieved platinum sales, i.e. over 1 million or 2
  million.
     4 (senseid en platin-class drug) {lb|en|medicine|sometimes, (l en
  ellipsis#Noun elliptically)} A platinum-based drug: a (l en
  platin#Etymology 2).
     vb.
     (lb en computer games) to reach platinum level in a game

  platinum
     Latin n.
     (l en platinum)

  platinum
     Latin n.
     (l en platinum)

  platinum
     Hollanti n.
     platina

  platinum
     Latin n.
     (tagg språk=la grundämnen) platina

  Platinum /plˈatɪnəm/
  البلاتين

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  плати́нен 2.
  colour
   3.
  musical recording

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  1. плати́на
  colour
  2. плати́на, платина
  metal

  platinum /plˈatɪnəm/
   [chem] platina (kov)
  

  platinum /plˈatɪnəm/ 
  platinwm 

  platinum /plˈatɪnəm/
  Platin  [chem.] Pt,  /pˌiːtˈiː/
   see: fulminating platin
  

  platinum /plˈatɪnəm/
  
  πλατίνα

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  1. platinanvaalea
  colour
  2. platina
  musical recording

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  1. platina
  metal
  2. platinalevy
  recording that has achieved platinum sales

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  päästä platinatasolle
  to reach platinum

  platinum /pleitinəm/
  platine

  platinum /pleitinəm/
  platanam

  platinum /plˈatɪnəm/ 
  1. प्लैटिनम्
        "The jewellers made of platinum are very expensive."

  platinum /plˈatɪnəm/
  platina

  platinum /plˈatɪnəm/
  platina

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  platina, emas kodok, emas putih
  metal

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  白金, プラチナ
  metal

  platinum /pleitinəm/
  platina

  platinum /pleitinəm/
  platina

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  platina
  metal

  platinum /ˈplætɪnəm/
  I.    platyna
  II.    platynowy

  platinum //pləˈtaɪn.əm// //pləˈtiːn.əm// //pləˈtɪn.əm// //ˈplæt.nəm// //ˈplæt.n̩.əm// //ˈplæt.ɪn.əm// 
  platina
  metal

  platinum /plˈatɪnəm/
  1. (kim.) platin. platinum black (kim.) platinden çıkanlan siyah bir toz. platinum blond platine veya beyaza yakın sarı saçlı (kimse) platinum metals tabii ve kimyasal özellikleri platine benzeyen birkaç maden.

  
/ˈpɫætənəm/, /ˈpɫætnəm/

  Platinum, AK -- U.S. city in Alaska
     Population (2000):    41
     Housing Units (2000): 26
     Land area (2000):     44.630629 sq. miles (115.592794 sq. km)
     Water area (2000):    0.071778 sq. miles (0.185904 sq. km)
     Total area (2000):    44.702407 sq. miles (115.778698 sq. km)
     FIPS code:            61080
     Located within:       Alaska (AK), FIPS 02
     Location:             59.006890 N, 161.815290 W
     ZIP Codes (1990):     99651
     Note: some ZIP codes may be omitted esp. for suburbs.
     Headwords:
      Platinum, AK
      Platinum
  

  n. 白金;

     n. 白金,铂