(countable and uncountable, plural refractivities)
- The quality or degree of being refractive.
Variant of refract
- to cause (a ray or wave of light, heat, or sound) to undergo refraction
- Optics to measure the degree of refraction of (an eye or lens)
Origin of refract; from Classical Latin refractus, past participle of refringere, to turn aside ; from re-, back + frangere, to break