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We found 20 dictionaries with English definitions that include the word index of refraction: Click on the first link on a line below to go directly to a page where "index of refraction" is defined. General (14 matching dictionaries) index of_refraction: American Heritage Dictionary of the English Language [home, info] index of_refraction: Collins English Dictionary [home, info] index of_refraction: Vocabulary.com [home, info] index of_refraction: Merriam-Webster's Online Dictionary, 11th Edition [home, info] index of_refraction: Wordnik [home, info] index of_refraction: Infoplease Dictionary [home, info] index of_refraction: Dictionary.com [home, info] Index of Refraction: Wikipedia, the Free Encyclopedia [home, info] index of_refraction: Rhymezone [home, info] index of_refraction: Free Dictionary [home, info] index of_refraction: Mnemonic Dictionary [home, info] index of_refraction: WordNet 1.7 Vocabulary Helper [home, info] index of_refraction: LookWAYup Translating Dictionary/Thesaurus [home, info] index of_refraction: Dictionary/thesaurus [home, info] Computing (2 matching dictionaries) Index of Refraction: I T Glossary [home, info] index of_refraction: Encyclopedia [home, info] Medicine (2 matching dictionaries) index of_refraction: online medical dictionary [home, info] Index of refraction: Medical dictionary [home, info] Science (1 matching dictionary) Index of Refraction: Eric Weisstein's World of Physics [home, info] Tech (1 matching dictionary) index of_refraction: Glossary of Meteorology [home, info]

Quick definitions from WordNet (index of refraction) ▸ noun:  the ratio of the velocity of light in a vacuum to that in a medium