Meaning of REFRACTIVITY in English

REFRACTIVITY

rə̇ˌfrakˈtivəd.ē, (ˌ)rēˌf-, -vətē, -i noun

( -es )

: refractive power ; specifically : the index of refraction minus one — compare specific refractivity

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.