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obsidianmore about obsidian

obsidian


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Obsidian  \Ob*sid"i*an\,  n.  [L.  Obsidianus  lapis,  so  named 
  according  to  Pliny,  after  one  Obsidius  who  discovered  it  in 
  Ethiopia:  cf.F.  obsidiane,  obsidienne  The  later  editions  of 
  Pliny  read  Obsianus  lapis,  and  Obsius  instead  of  Obsidianus 
  lapis,  and  Obsidius.]  (Min.) 
  A  kind  of  glass  produced  by  volcanoes.  It  is  usually  of  a 
  black  color,  and  opaque,  except  in  thin  splinters. 
 
  Note:  In  a  thin  section  it  often  exhibits  a  fluidal 
  structure,  marked  by  the  arrangement  of  microlites  in 
  the  lines  of  the  flow  of  the  molten  mass. 
 
  From  WordNet  r  1.6  [wn]: 
 
  obsidian 
  n  :  acid  or  granitic  glass;  usually  dark,  but  transparent  in 
  thin  pieces 
 
  From  U.S.  Gazetteer  (1990)  [gazetteer]: 
 
  Obsidian,  ID 
  Zip  code(s):  83340 




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