re·​frac·​tiv·​i·​ty ˌrē-ˌfrak-ˈtiv-ət-ē, ri- How to pronounce refractivity (audio)
plural refractivities
: the ability of a substance to refract light expressed quantitatively
specifically : the index of refraction minus one

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Cite this Entry

“Refractivity.” Medical Dictionary, Merriam-Webster, Accessed 16 Apr. 2024.

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