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reactant

[ ree-ak-tuhnt ]
/ riˈæk tənt /
SEE SYNONYMS FOR reactant

noun

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

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Origin of reactant

First recorded in 1925–30; react + -ant

Words nearby reactant

reach-me-down, reach rod, reacquire, react, reactance, reactant, reaction, reactionary, reaction chamber, reaction engine, reaction formation
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Words related to reactant

impetus, motivation, incentive, stimulant, incitement, reactionary, spur, goad, incendiary, agitator, impulse, incitation, synergist, adjuvant, enzyme, yeast, leaven, ferment, spark plug

Example sentences from the Web for reactant

British Dictionary definitions for reactant

reactant
/ (rɪˈæktənt) /

noun

a substance that participates in a chemical reaction, esp a substance that is present at the start of the reactionCompare 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

Medical definitions for reactant

reactant
[ rē-ăk′tənt ]

n.

A substance participating in a chemical reaction, especially a directly reacting substance present at the start of the reaction.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for reactant

reactant
[ rē-ăk′tənt ]

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.