reactant

[ ree-ak-tuhnt ]
See synonyms for reactant on Thesaurus.com
noun
  1. a person or thing that reacts.

  2. Also called interactant. Chemistry. any substance that undergoes a chemical change in a given reaction.

Origin of reactant

1
First recorded in 1925–30; react + -ant

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

British Dictionary definitions for reactant

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 (def. 4)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for reactant

reactant

[ rē-ăktənt ]


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

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.