[1] : The Collaborative International Dictionary of English v.0.48

vanishing \van"ishing\,
   a.  n. from vanish, v.
   1913 webster

   vanishing fraction math., a fraction which reduces to the
      form 0/0 for a particular value of the variable which
      enters it, usually in consequence of the existence of a
      common factor in both terms of the fraction, which factor
      becomes 0 for this particular value of the variable.
      --math. dict.

   vanishing line persp., the intersection of the parallel
      of any original plane and the picture; one of the lines
      converging to the vanishing point.

   vanishing point persp., the point to which all parallel
      lines in the same plane tend in the representation.
      --gwilt.

   vanishing stress phon., stress of voice upon the closing
      portion of a syllable. --rush.
      1913 webster
see also:
vanish vanishing fraction vanishing line vanishing point vanishing stress 

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