reactant
noun
re·ac·tant
rē-ˈak-tənt 
: 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
Like Pac-Man, this domain closes around reactants and reopens to release products.
—
Priyanka Naik, The Conversation, 7 Mar. 2025
The compartments formed by a matrix and a membrane crucially provide a stable environment that can concentrate reactants and protect them from the external environment, allowing the necessary chemical reactions to take place.
—Discover Magazine, 17 Oct. 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
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
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Priyanka Naik, The Conversation, 7 Mar. 2025
The compartments formed by a matrix and a membrane crucially provide a stable environment that can concentrate reactants and protect them from the external environment, allowing the necessary chemical reactions to take place.
—Discover Magazine, 17 Oct. 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
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
Cite this Entry
“Reactant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reactant. Accessed 4 Nov. 2025.
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reactant
noun
re·ac·tant
rē-ˈak-tənt
: a substance that enters into and is changed by a chemical reaction
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