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reactant

reac·tant

common

noun

1.

a chemical substance that is present at the start of a chemical reaction

Origin

From react + -ant.

Related words

Word family

Broader terms

WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.