refract
verb
Forms refracts refracting refracted
- verb (transitive, physics) Of a medium, substance, object, etc.: to deflect the course of (light rays), esp. when they enter the medium, etc., at an oblique angle; to cause refraction of (light, other electromagnetic radiation, or sound or other wave phenomena).
- verb (transitive, figurative) To mediate; to alter; to distort.
- verb (transitive, optics) To cause (light) to change direction as a result of entering a different medium.
- verb (transitive, ophthalmology) To measure, and often also to correct with lenses, the refractive error of (an eye) or the eyes of (a person). “A prism can refract light.”
Etymology
From Latin refrāctum, neuter form of refrāctus, the past participle of refringō, itself from re- (“again”) + frangō (“to break”).
Webster’s 1913
- verb To bend sharply and abruptly back; to break off.
- verb To break the natural course of, as rays of light orr heat, when passing from one transparent medium to another of different density; to cause to deviate from a direct course by an action distinct from reflection; as, a dense medium refrcts the rays of light as they pass into it from a rare medium.
Etymology [L. refractus, p. p. of refringere; pref. re- re- + frangere to break: cf. F. réfracter. SEe FRacture, and cf. Refrain, n.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “refract”, CC BY-SA 4.0. Details