noun
Meaning 1
Synonym of refractive index
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: refractive index
Antonyms: none provided
Phrase guide
index of refraction
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
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noun
Meaning 2
the ratio of the velocity of light in a vacuum to that in a medium
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: refractive index
Antonyms: none provided
Broader terms: ratio
History
Etymology
No etymology was provided for this word.