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diluent

American  
[dil-yoo-uhnt] / ˈdɪl yu ənt /

adjective

  1. serving to dilute; diluting.


noun

  1. a diluting substance.

diluent British  
/ ˈdɪljʊənt /

adjective

  1. causing dilution or serving to dilute

"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

noun

  1. a substance used for or causing dilution

"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

Etymology

Origin of diluent

1715–25; < Latin dīluent- (stem of dīluēns ), present participle of dīluere to dilute; -ent

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.

To make Orinoco oil marketable, producers must blend it with lighter hydrocarbons, known as diluent, or upgrade it into a lighter synthetic crude using large industrial facilities.

From Barron's • Jan. 6, 2026

One was carrying Russian naphtha—a diluent Venezuela uses to mix with heavy oil—to the South American country when it turned tail in the Indian Ocean; the others were empty.

From The Wall Street Journal • Dec. 17, 2025

They are made by mixing high concentrations of salt in solvent with another liquid called a diluent, which makes the electrolyte flow better so that the power of the battery can be maintained.

From Science Daily • Nov. 8, 2023

Before dawn on a recent raw morning, Susan Bissonnette, the nurse in charge, prepared enough vials of the Pfizer vaccine and diluent for the first few hundred shots of the day.

From New York Times • Feb. 28, 2021

The doctors agreed; Epsom salts were bitter, diluent, absorbent, soluble, cathartic—everything that salts should be.

From Highways and Byways in Surrey by Thomson, Hugh