单词	index of refraction
释义	index of refraction noun phrase : refractive index Word History First Known Use 1829, in the meaning defined above Medical Definition index of refraction noun : the ratio of the speed of radiation (as light) in one medium (as a vacuum) to that in another medium called also refractive index
随便看	tangleberry tanglebush tanglebushes tangled tangled with tanglefish tanglefoot tanglefoots tanglehead tanglement tanglements tangleroot tanglers tangles tangles with tanglewrack tanglier tangliest tangling tangling with tanglings tangly tango tangoed tangoing

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