reactant

[ ree-ak-tuhnt ]

noun

1. a person or thing that reacts.
2. Also called interactant. Chemistry. any substance that undergoes a chemical change in a given reaction.

reactant

/ rɪˈæktənt /

noun

1. a substance that participates in a chemical reaction, esp a substance that is present at the start of the reaction Compare product

reactant

/ rē-ăk′tənt /

1. A substance participating in a chemical reaction, especially one present at the start of the reaction.

Word History and Origins

Origin of reactant¹

First recorded in 1925–30; react + -ant

Example Sentences

The same mixing happened when three different blobs, each carrying a single reactant, fused together.

From Singularity Hub 

Captain Strong took his place in the pilot's chair next to Tom and strapping himself in snapped out, "Feed reactant!"

From Project Gutenberg

"Empty the reactant fuel tanks of all but enough for us to raise ship and touch down over to the fairgrounds," said Strong.

From Project Gutenberg

On the power deck, the big cadet turned to his control panel, took a deep breath, and opened the reactant feeders wide.

From Project Gutenberg

If you so much as smell that grub, I'll come down and feed you into the reactant chamber!

From Project Gutenberg

I don't know who's going to be first, but I can't even strip my ship by tomorrow morning, let alone soup up the reactant.

From Project Gutenberg

Related Words

• impetus
• incentive
• motivation
• stimulant