[ ree-ey-juh nt ]
/ riˈeɪ dʒənt /

noun Chemistry.

a substance that, because of the reactions it causes, is used in analysis and synthesis.


Origin of reagent

1790–1800; re(act) + agent; cf. act Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for reagent

British Dictionary definitions for reagent


/ (riːˈeɪdʒənt) /


a substance for use in a chemical reaction, esp for use in chemical synthesis and analysis

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

Medicine definitions for reagent


[ rē-ājənt ]


A substance used in a chemical reaction to detect, measure, examine, or produce other substances.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for reagent


[ rē-ājənt ]

A substance participating in a chemical reaction, especially one used to detect, measure, or produce another substance. Compare agent.

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