Definition from Wiktionary, the free dictionary
- From Latin refractum, the neutralal inflection of refractus, the past participle of refringere, itself from re- 'again' + frangere 'to break'.
- (intransitive, of light) To change direction as a result of entering a different medium
- (transitive, optics) To cause (light) to change direction as a result of entering a different medium.
- A prism can refract light.
Derived terms 
Related terms 
to change direction
to cause to change direction
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