Dictionary

reactant

noun re·ac·tant \-tənt\

chemistry : a substance that changes when it is combined with another substance in a chemical reaction

Full Definition of REACTANT

:  a substance that enters into and is altered in the course of a chemical reaction

First Known Use of REACTANT

circa 1920

Rhymes with REACTANT

reactant

noun re·ac·tant \-tənt\   (Medical Dictionary)

Medical Definition of REACTANT

:  a substance that enters into and is altered in the course of a chemical reaction
reactant adjective

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