Examples from the Web for dispersive
(b) If r2 < r1 the lens is dispersive so long as d < n(r1 − r2)/(n − 1).
These effects are due to the difference in dispersive power of the powder and the liquid.
The effect in question depends upon the dispersive power of the prism.
He was anything but a philanthropist; his weaknesses, if he had any, were not dispersive, but thoroughly concentric.Springhaven|R. D. Blackmore
The refractive and dispersive powers are not high, so that the cut stones display little brilliancy or “fire.”