Dispersive
Pronunciation : Dis*pers"ive
Part of Speech : a.
Definition : Defn: Tending to disperse. Dispersive power (Opt.), the relative effect of a material in separating the different rays of light by refraction, as when the substance is formed into a prism. -- Dis*pers"ive*ness, n.
Source : Webster's Unabridged Dictionary, 1913