dil·​u·​ent | \ ˈdil-yə-wənt How to pronounce diluent (audio) , -yü-ənt \

Definition of diluent

: a diluting agent (such as the vehicle in a medicinal preparation)

Examples of diluent in a Sentence

Recent Examples on the Web The vaccine comes as a powder, which must be reconstituted with an accompanying solution of sterile diluent and then used within 6 hours. Leslie Roberts, Scientific American, "Why Measles Deaths Are Surging—and Coronavirus Could Make it Worse," 8 Apr. 2020 Sanctions could take the shape of cutting off those purchases, though an equally effective tactic would be refusing to sell Venezuela the diluent that makes its crude marketable. Spencer Jakab, WSJ, "Why the Oil Market Is Shrugging at Venezuela," 24 Jan. 2019 The second situation would play out if the U.S. halts exports to Venezuela of a product called diluent, which allows the thick oil to be transported. Spencer Jakab, WSJ, "Venezuela’s Brewing Oil Shock May Be Bigger Than Iran’s," 10 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diluent.' 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 diluent

circa 1721, in the meaning defined above

History and Etymology for diluent

Latin diluent-, diluens, present participle of diluere

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Time Traveler for diluent

Time Traveler

The first known use of diluent was circa 1721

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Statistics for diluent

Cite this Entry

“Diluent.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diluent. Accessed 26 Nov. 2020.

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More Definitions for diluent


dil·​u·​ent | \ ˈdil-yə-wənt How to pronounce diluent (audio) \

Medical Definition of diluent

 (Entry 1 of 2)

: a diluting agent (as the vehicle in a medicinal preparation)



Medical Definition of diluent (Entry 2 of 2)

: making thinner or less concentrated by admixture : diluting

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