refractive index - WordReference.com Dictionary of English

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- - reformat
  - reformation
  - reformatory
  - Reformed Church
  - reformist
  - reformulate
  - refound
  - refract
  - refracting telescope
  - refraction
  - refractive index
  - refractometer
  - refractor
  - refractory
  - refrain
  - reframe
  - refrangible
  - refreeze
  - refresh
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refractive index

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Concise Oxford English Dictionary © 2008 Oxford University Press:
refractive index

▶noun the ratio of the velocity of light in a vacuum to its velocity in a specified medium.

'refractive index' also found in these Oxford entries:

crystal - refractometer

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