# reactant

> English word · Noun · frequency rank #70,195

## Definitions
1. Any of the participants present at the start of a chemical reaction, specifically one that is consumed during the reaction.

## Etymology
From react + -ant.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/reactant