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refract (v.)

"to bend or break the natural course of" (light, sound, heat, etc.), 1610s, back-formation from refraction, and in part from Latin refractus, past participle of refringere "to break up," from re- "back" (see re-) + combining form of frangere "to break" (from PIE root *bhreg- "to break"). Related: Refracted; refracting.

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Definitions of refract from WordNet

refract (v.)
subject to refraction;
refract a light beam
refract (v.)
determine the refracting power of (a lens);
From wordnet.princeton.edu