We found 19 dictionaries that define the word index of refraction:

General (12 matching dictionaries)

1. index of refraction: Merriam-Webster
2. index of refraction: American Heritage Dictionary of the English Language
3. index of refraction: Collins English Dictionary
4. index of refraction: Vocabulary.com
5. index of refraction: Wordnik
6. index of refraction: Infoplease Dictionary
7. index of refraction: Dictionary.com
8. Index Of Refraction, Index of Refraction, Index of refraction: Wikipedia, the Free Encyclopedia
9. index of refraction: Rhymezone
10. index of refraction: FreeDictionary.org
11. index of refraction: Mnemonic Dictionary
12. index of refraction: TheFreeDictionary.com

Computing (2 matching dictionaries)

13. index of refraction: Encyclopedia
14. I T Glossary (No longer online)

Medicine (3 matching dictionaries)

15. index of refraction: Merriam-Webster Medical Dictionary
16. online medical dictionary (No longer online)
17. Index of refraction: Medical dictionary

Science (1 matching dictionary)

18. Index of Refraction: Eric Weisstein's World of Physics

Tech (1 matching dictionary)

19. Glossary of Meteorology (No longer online)

(Note: See index_of_refractions as well.)

Definitions from WordNet (index of refraction) ▸ noun:  the ratio of the velocity of light in a vacuum to that in a medium Phrases: complex index of refraction, relative index of refraction, absolute index of refraction, more... ▸ Words similar to index of refraction ▸ Usage examples for index of refraction ▸ Idioms related to index of refraction ▸ Wikipedia articles (New!) ▸ Words that often appear near index of refraction ▸ Rhymes of index of refraction ▸ Invented words related to index of refraction