Reagent

//ɹiˈeɪ.d͡ʒənt// noun

Definitions

Noun
  1. 1
    A compound or mixture of compounds used to treat or test materials, samples, other compounds or reactants in a laboratory or sometimes an industrial setting.
  2. 2
    a chemical agent for use in chemical reactions wordnet

Etymology

Possibly from Latin reagō. Compare with Norwegian Bokmål reagens. The sequence of act → action → agent → agency shows morphologic and semantic parallel, and apparent cognate relation, with react → reaction → reagent → reagency.

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