The Collaborative International Dictionary
Vanishing \Van"ish*ing\, a. & n. from Vanish, v.
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 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.
Usage examples of "vanishing line".
Then he walked away, down the vanishing line of rail, and it seemed to her that both the rail and the figure were abandoning her at the same time.
He did his best to look back through the small rearview mirror, along the curving, steadily vanishing line of telegraph poles.