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calcium

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calcium


  4  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Calcium  \Cal"ci*um\  (k[a^]l"s[i^]*[u^]m),  n.  [NL.,  from  L.  calx, 
  calcis,  lime;  cf  F.  calcium.  See  {Calx}.]  (Chem.) 
  An  elementary  substance;  a  metal  which  combined  with  oxygen 
  forms  lime.  It  is  of  a  pale  yellow  color,  tenacious,  and 
  malleable.  It  is  a  member  of  the  alkaline  earth  group  of 
  elements.  Atomic  weight  40.  Symbol  Ca 
 
  Note:  Calcium  is  widely  and  abundantly  disseminated,  as  in 
  its  compounds  calcium  carbonate  or  limestone,  calcium 
  sulphate  or  gypsum,  calcium  fluoride  or  fluor  spar, 
  calcium  phosphate  or  apatite. 
 
  {Calcium  light},  an  intense  light  produced  by  the 
  incandescence  of  a  stick  or  ball  of  lime  in  the  flame  of  a 
  combination  of  oxygen  and  hydrogen  gases,  or  of  oxygen  and 
  coal  gas;  --  called  also  {Drummond  light}. 
 
  From  WordNet  r  1.6  [wn]: 
 
  calcium 
  n  :  a  white  metallic  element  that  burns  with  a  brilliant  light; 
  the  fifth  most  abundant  element  in  the  earth's  crust;  an 
  important  component  of  most  plants  and  animals  [syn:  {Ca}, 
  {atomic  number  20}] 
 
  From  U.S.  Gazetteer  (1990)  [gazetteer]: 
 
  Calcium,  NY  (CDP,  FIPS  11671) 
  Location:  44.03470  N,  75.84798  W 
  Population  (1990):  2465  (894  housing  units) 
  Area:  14.5  sq  km  (land),  0.0  sq  km  (water) 
  Zip  code(s):  13616 
 
  From  Elements  database  20001107  [elements]: 
 
  calcium 
  Symbol:  Ca 
  Atomic  number:  20 
  Atomic  weight:  40.08 
  Soft  grey  metallic  element  belonging  to  group  2  of  the  periodic  table. 
  Used  a  reducing  agent  in  the  extraction  of  thorium,  zirconium  and 
  uranium.  Essential  element  for  living  organisms. 
 
 




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