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2 definitions found
 for bitblt
From The Jargon File (version 4.4.7, 29 Dec 2003) :

  bitblt
   /bit'blit/, n.
  
      [from BLT, q.v.:]
  
      1. [common] Any of a family of closely related algorithms for moving and
      copying rectangles of bits between main and display memory on a bit-mapped
      device, or between two areas of either main or display memory (the
      requirement to do the Right Thing in the case of overlapping source and
      destination rectangles is what makes BitBlt tricky).
  
      2. Synonym for blit or BLT. Both uses are borderline techspeak.
  

From The Free On-line Dictionary of Computing (30 December 2018) :

  bitblt
  
     /bit'blit/ [{BLT] 1. Any of a family of closely related
     algorithms for moving and copying rectangles of bits between
     main and display memory on a bit-mapped device, or between
     two areas of either main or display memory (the requirement to
     do the Right Thing in the case of overlapping source and
     destination rectangles is what makes BitBlt tricky).
  
     2. blit, BLT.
  
     [{Jargon File]
  

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