[W/K] :: lossy

  lossy
       adj : characterized by or causing dissipation of energy [ant: lossless]

  lossy
       
           A term describing a data compression algorithm
          which actually reduces the amount of information in the data,
          rather than just the number of bits used to represent that
          information.  The lost information is usually removed because
          it is subjectively less important to the quality of the data
          (usually an image or sound) or because it can be recovered
          reasonably by interpolation from the remaining data.
       
          MPEG and JPEG are examples of lossy compression
          techniques.
       
          Opposite: lossless.
       
          (1995-03-29)