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 ]