reactant

noun

re·​ac·​tant rē-ˈak-tənt How to pronounce reactant (audio)
: a substance that enters into and is altered in the course of a chemical reaction

Examples of reactant in a Sentence

Recent Examples on the Web As illustrated by this simplified diagram of the human metabolome (where lines indicate chemical reactions and dots indicate reactants or products), your metabolic network is incredibly complex. Travis Nemkov, Discover Magazine, 11 Apr. 2024 The chemical processes are generally most efficient when there’s a constant supply of power and reactants. Matthias Mueller, IEEE Spectrum, 19 Aug. 2023 Their expertise ensures proper handling of reactants, precise control of reaction conditions, and the ability to troubleshoot any unexpected challenges that may arise. Amber Smith, Discover Magazine, 9 July 2023 According to one study, there are actually five levels of boredom: indifferent, calibrating, searching, reactant, and apathetic. Joey Camire, Quartz, 21 Mar. 2020 For our purposes, level three (searching) and level four (reactant) are the most relevant. Joey Camire, Quartz, 21 Mar. 2020 The Chinese scientists added polyethylene glycol into the reactant mix when building their COF compound, which effectively bridged the porous spaces to create a version that was much more compact and flexible. Jennifer Ouellette, Ars Technica, 21 July 2019 Nasal swabs would be collected from a patient, placed into a tube and mixed with a reactant. Anna Bauman, SFChronicle.com, 29 Jan. 2020 Modern suits come equipped with tiny, microscopic balls of heat-reactant chemicals that helped protect astronauts from the frigid temps. Jennifer Leman, Popular Mechanics, 22 Nov. 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'reactant.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1916, in the meaning defined above

Time Traveler
The first known use of reactant was in 1916

Dictionary Entries Near reactant

Cite this Entry

“Reactant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reactant. Accessed 25 Jun. 2024.

Kids Definition

reactant

noun
re·​ac·​tant rē-ˈak-tənt How to pronounce reactant (audio)
: a substance that enters into and is changed by a chemical reaction

Medical Definition

reactant

noun
re·​ac·​tant -tənt How to pronounce reactant (audio)
: a substance that enters into and is altered in the course of a chemical reaction
reactant adjective

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