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focal

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focal


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Focal  \Fo"cal\,  a.  [Cf.  F.  focal.  See  {Focus}.] 
  Belonging  to,or  concerning,  a  focus;  as  a  focal  point. 
 
  {Focal  distance,  or  length,  of  a  lens  or  mirror}  (Opt.),  the 
  distance  of  the  focus  from  the  surface  of  the  lens  or 
  mirror,  or  more  exactly,  in  the  case  of  a  lens,  from  its 
  optical  center. 
 
  {Focal  distance  of  a  telescope},  the  distance  of  the  image  of 
  an  object  from  the  object  glass. 
 
  From  WordNet  r  1.6  [wn]: 
 
  focal 
  adj  1:  having  or  localized  centrally  at  a  focus;  "focal  point"; 
  "focal  infection" 
  2:  of  or  relating  to  a  focus;  "focal  length" 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  FOCAL 
 
  1.  FOrmula  CALculator. 
 
  An  interactive  system  written  by  Rick  Merrill  of  {DEC}  in  1969 
  for  {PDP-5}  and  {PDP-8}.  It  was  a  descendant  of  {AID}/{JOSS}. 
 
  Versions:  FOCAL-69,  FOCAL-1971,  FOCAL-11  (for  {PDP-11}  under 
  {RT-11}). 
 
  (1994-12-21) 
 
  2.  Forty-One  CAlculator  Language. 
 
  The  programming  language  of  the  HP-41  calculator  line 
 
  (1994-12-21) 
 
 




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