of or relating to refraction.
Also, refractile. having power to refract.
of or concerned with refraction
(of a material or substance) capable of causing refraction
noun, Optics. 1. index of refraction. refractive index noun 1. (physics) a measure of the extent to which radiation is refracted on passing through the interface between two media. It is the ratio of the sine of the angle of incidence to the sine of the angle of refraction, which can be shown to be […]
- Refractive keratotomy
refractive keratotomy n. Surgical modification of corneal curvature by incising the cornea to minimize hyperopia, myopia, or astigmatism.
[ree-frak-tiv-i-tee] /ˌri frækˈtɪv ɪ ti/ noun 1. the power to refract.
[ree-frak-tom-i-ter] /ˌri frækˈtɒm ɪ tər/ noun, Optics. 1. an instrument for determining the refractive index of a substance. refractometer /ˌriːfrækˈtɒmɪtə/ noun 1. any instrument for determining the refractive index of a substance refractometer re·frac·tom·e·ter (rē’frāk-tŏm’ĭ-tər) n. Any of several instruments used to measure the refractive index of a substance.