Longman Dictionary of Contemporary English homepage

Topic: CHEMISTRY

Date: 1700-1800
Language: Modern Latin
Origin: , present participle of reagere 'to react', from Latin agere 'to act'

reagent

 noun
     
re‧a‧gent [countable] technical
HC a substance that shows that another substance in a compound exists, by causing a chemical reaction
Definition of reagent from the Longman Dictionary of Contemporary English within
the topic CHEMISTRY
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