noun
- substances that participate in and are changed by a chemical reaction
Usage: chemistry; plural form of reactant
Examples
- The reactants were mixed in a test tube to begin the experiment.
- Hydrogen and oxygen are the reactants in the formation of water.
- The chemist measured the exact amounts of reactants needed for the reaction.
- When reactants combine, they form new products with different properties.
- The reaction rate depends on the concentration of the reactants.
- All reactants must be present for the chemical equation to balance.