Definition

A substance that takes part in a chemical reaction and is changed during the process.

Example

In the experiment, water acted as a reactant in the chemical reaction.

Conversation

Have you ever heard of a reactant in chemistry?

Yeah, it's the substance that takes part in a chemical reaction, right?

Exactly! Without a reactant, no reaction can happen at all.

That makes sense — it's like the fuel for the reaction!

Synonyms & Antonyms

Root Explanation

Reactant → It is formed from "re-" (meaning again) and "actant" (from Latin "agere", meaning to act). The word describes a substance that acts again in a chemical reaction.

Memory Tip

Think of a substance that 'acts again' in a reaction — 're-' means again, and 'actant' relates to acting.

Visually Confused Words