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refractometer

American  
[ree-frak-tom-i-ter] / ˌri frækˈtɒm ɪ tər /

noun

Optics.
  1. an instrument for determining the refractive index of a substance.


refractometer British  
/ rɪˌfræktəˈmɛtrɪk, ˌriːfrækˈtɒmɪtə /

noun

  1. any instrument for determining the refractive index of a substance

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of refractometer

First recorded in 1875–80; refract + -o- + -meter

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

A device called a refractometer, sold on Amazon for $20 to $30, can measure Brix levels from a drop of juice.

From New York Times Apr. 17, 2018

He watched as Ms. Newton cut some honeycombs and spooned a dollop onto the small glass surface of a refractometer, a device used to gauge the moisture content in the honey.

From New York Times Sep. 10, 2017

Mr. Reyes agreed when she handed the refractometer to him.

From New York Times Sep. 10, 2017

Foxx says that the constant shuttling around during harvest was a source of irritated amusement to her pickers until she started teaching them to use the refractometer themselves.

From Slate Jan. 25, 2013

The refractive index, which is thus a very important character in the scientific discrimination of gem-stones, may be conveniently determined, within certain limits, by means of the refractometer devised by Dr G.F.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 5 "Gassendi, Pierre" to "Geocentric" by Various

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