noun
- a substance that takes part in and undergoes change during a chemical reaction
Usage: chemistry
Examples
- The reactants were mixed in a test tube to observe the chemical change.
- Hydrogen and oxygen are the reactants in the formation of water.
- The concentration of reactants affects the rate of the reaction.
- All reactants must be present for the synthesis to occur.
- The chemist measured the exact amounts of each reactant needed.
- As the reaction proceeds, reactants are consumed and products are formed.