1)refractivity[rifræk'tiviti],折射系数，折射性;折射率差2)specific refractivity,折射率系数;折射率差度3)Refractive index difference,折射率差4)refractive index coefficient,折射率系数5)refringence,折射;折射率差6)index of refraction,折射指数，折射率
用法例句
Analysis of large refractive index difference of GRIN-rod lenses caused by ion-exchanging;
离子交换引起的GRIN棒透镜大折射率差值分析
The refractive index coefficient of the material obtained was -1.
