Definition of reactant
: a substance that enters into and is altered in the course of a chemical reaction
Recent Examples of reactant from the Web
In a story that is increasingly pervasive in the field of molecular synthesis, BDO’s chemical production protocol – typically involving toxic reactants like formaldehyde – is being challenged by a biological approach.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'reactant.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of reactant
REACTANT Defined for English Language Learners
Definition of reactant for English Language Learners
chemistry : a substance that changes when it is combined with another substance in a chemical reaction
Seen and Heard
What made you want to look up reactant? Please tell us where you read or heard it (including the quote, if possible).