re·​frac·​tom·​e·​ter | \ ˌrē-ˌfrak-ˈtä-mə-tər How to pronounce refractometer (audio) , ri- \

Definition of refractometer

: an instrument for measuring refractive indices (as for identification or the determination of sugar content)

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Other Words from refractometer

refractometric \ ri-​ˌfrak-​tə-​ˈme-​trik How to pronounce refractometric (audio) \ adjective
refractometry \ ˌrē-​ˌfrak-​ˈtä-​mə-​trē How to pronounce refractometry (audio) , ri-​ \ noun

Examples of refractometer in a Sentence

Recent Examples on the Web Now, some Dunkin’ shops use digital refractometers to determine if coffee meets specifications. Eric Morath, WSJ, "Short of Workers, Fast-Food Restaurants Turn to Robots," 24 June 2018 Theft, Westway Drive: The president of Optics Incorporated reported receiving a fraudulent purchase order four $36,000 refractometers that were sent to a New York address. Brian Lisik/special To,, "Lumber carts come up missing from Home Depot yard: Brunswick Police Blotter," 2 Apr. 2018 This is a little nerdy, but a refractometer uses light to identify the components and ingredient levels in solutions, which is super helpful for calculating the percentage of alcohol in a beverage. Alex Delany, Bon Appetit, "13 Fermenting Supplies to Buy Online Before You Start Making Kombucha or Whatever," 29 Jan. 2018 After finding the right water quality for sea salt production, the next step is testing the salinity with a refractometer—in simple terms, testing the saltiness. Jessica Colley Clarke, CNT, "The Best Salt in the World Comes from Wales," 17 Aug. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'refractometer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of refractometer

1842, in the meaning defined above

History and Etymology for refractometer

International Scientific Vocabulary

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Time Traveler for refractometer

Time Traveler

The first known use of refractometer was in 1842

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Cite this Entry

“Refractometer.” Dictionary, Merriam-Webster, Accessed 13 Aug. 2020.

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More Definitions for refractometer


re·​frac·​tom·​e·​ter | \ ˌrē-ˌfrak-ˈtäm-ət-ər, ri- How to pronounce refractometer (audio) \

Medical Definition of refractometer

: an instrument for measuring indices of refraction

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