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refractivity

 - 3 dictionary results

re⋅frac⋅tiv⋅i⋅ty

  [ree-frak-tiv-i-tee]
Use refractivity in a Sentence
–noun
the power to refract.
Also called refringence.

Origin:
refractive + -ity
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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re·frac·tion   (rĭ-frāk'shən)   


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n.  

  1. The turning or bending of any wave, such as a light or sound wave, when it passes from one medium into another of different optical density.

  2. Astronomy The apparent change in position of celestial objects caused by the bending of light rays entering Earth's atmosphere.

  3. Medicine

    1. The ability of the eye to bend light so that an image is focused on the retina.

    2. Determination of the refractive characteristics of the eye.

re·frac'tion·al, re·frac'tive adj., re·frac'tive·ly adv., re·frac'tive·ness, re'frac·tiv'i·ty (rē'frāk-tĭv'ĭ-tē) n.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: re·frac·tiv·i·ty
Pronunciation: "rE-"frak-'tiv-&t-E, ri-
Function: noun
Inflected Form: plural -ties
: the ability of a substance to refract light expressed quantitatively; specifically : the index of refraction minus one
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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