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3.145.8.2
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From: Webster's Revised Unabridged Dictionary (1913)

 Dis·pers·ive a. 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.
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