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cobalt

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cobalt

 

  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Cobalt  \Co"balt\  (k[=o]"b[o^]lt;  277,  74),  n.  [G.  kobalt,  prob. 
  fr  kobold,  kobel,  goblin,  MHG.  kobolt;  perh.  akin  to  G. 
  koben  pigsty,  hut,  AS  cofa  room  cofgodas  household  gods, 
  Icel.  kofi  hut.  If  so  the  ending  -old  stands  for  older 
  -walt,  -wald,  being  the  same  as  -ald  in  E.  herald  and  the 
  word  would  mean  ruler  or  governor  in  a  house,  house  spirit, 
  the  metal  being  so  called  by  miners,  because  it  was  poisonous 
  and  troublesome.  Cf  {Kobold},  {Cove},  {Goblin}.] 
  1.  (Chem.)  A  tough,  lustrous,  reddish  white  metal  of  the  iron 
  group  not  easily  fusible,  and  somewhat  magnetic.  Atomic 
  weight  59.1.  Symbol  Co 
 
  Note:  It  occurs  in  nature  in  combination  with  arsenic, 
  sulphur,  and  oxygen,  and  is  obtained  from  its  ores, 
  smaltite,  cobaltite,  asbolite,  etc  Its  oxide  colors 
  glass  or  any  flux,  as  borax,  a  fine  blue,  and  is  used 
  in  the  manufacture  of  smalt.  It  is  frequently 
  associated  with  nickel,  and  both  are  characteristic 
  ingredients  of  meteoric  iron. 
 
  2.  A  commercial  name  of  a  crude  arsenic  used  as  fly  poison. 
 
  {Cobalt  bloom}.  Same  as  {Erythrite}. 
 
  {Cobalt  blue},  a  dark  blue  pigment  consisting  of  some  salt  of 
  cobalt,  as  the  phosphate,  ignited  with  alumina;  --  called 
  also  {cobalt  ultramarine},  and  {Thenard's  blue}. 
 
  {Cobalt  crust},  earthy  arseniate  of  cobalt. 
 
  {Cobalt  glance}.  (Min.)  See  {Cobaltite}. 
 
  {Cobalt  green},  a  pigment  consisting  essentially  of  the 
  oxides  of  cobalt  and  zinc;  --  called  also  {Rinman's 
  green}. 
 
  {Cobalt  yellow}  (Chem.),  a  yellow  crystalline  powder, 
  regarded  as  a  double  nitrite  of  cobalt  and  potassium. 
 
  From  WordNet  r  1.6  [wn]: 
 
  cobalt 
  n  :  a  hard  ferromagnetic  silver-white  bivalent  or  trivalent 
  metallic  element;  a  trace  element  in  plant  and  animal 
  nutrition  [syn:  {Co},  {atomic  number  27}] 
 
  From  Elements  database  20001107  [elements]: 
 
  cobalt 
  Symbol:  Co 
  Atomic  number:  27 
  Atomic  weight:  58.993 
  Light  grey  transition  element.  Some  meteorites  contain  small  amounts  of 
  metallic  cobalt.  Generally  alloyed  for  use  Mammals  require  small  amounts 
  of  cobalt  salts.  Cobalt-60,  an  artificially  produced  radioactive  isotope 
  of  Cobalt  is  an  important  radioactive  tracer  and  cancer-treatment  agent. 
  Discovered  by  G.  Brandt  in  1737.




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