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biprism

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biprism


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Biprism  \Bi"prism\,  n.  [Pref.  bi-  +  prism.] 
  1.  A  prism  whose  refracting  angle  is  very  nearly  180  degrees. 
 
  2.  A  combination  of  two  short  rectangular  glass  prisms 
  cemented  together  at  their  diagonal  faces  so  as  to  form  a 
  cube;  --  called  also  {optical  cube}.  It  is  used  in  one 
  form  of  photometer. 
 
  From  WordNet  r  1.6  [wn]: 
 
  biprism 
  n  :  for  obtaining  interference  fringes 




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