reactant
noun
re·ac·tant rē-ˈak-tənt 
: a substance that enters into and is altered in the course of a chemical reaction
Example Sentences
Recent Examples on the Web 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 Each bubble contains its own set of reactants, which can be coalesced by driving the bubbles together. Chris Lee, Ars Technica, 26 July 2019 In this case, the researchers flow the reactants through the chamber in a single direction, and the nanotubes grow along the same direction as that flow. John Timmer, Ars Technica, 15 May 2018 This was accomplished through a variant of a standard technique called chemical vapor deposition, in which the reactants that generate the nanotube are present in the atmosphere of the reaction chamber. John Timmer, Ars Technica, 15 May 2018 See More
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 Each bubble contains its own set of reactants, which can be coalesced by driving the bubbles together. Chris Lee, Ars Technica, 26 July 2019 In this case, the researchers flow the reactants through the chamber in a single direction, and the nanotubes grow along the same direction as that flow. John Timmer, Ars Technica, 15 May 2018 This was accomplished through a variant of a standard technique called chemical vapor deposition, in which the reactants that generate the nanotube are present in the atmosphere of the reaction chamber. John Timmer, Ars Technica, 15 May 2018 See More Word History
First Known Use
1916, in the meaning defined above
Medical Definition
reactant
noun
re·ac·tant -tənt
: a substance that enters into and is altered in the course of a chemical reaction