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reagent

/ɹiˈeɪ.d͡ʒənt/ noun

Latin root: reagō Wiktionary

noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about reagent at Wordnik → Where our words come from →

  1. A chemical agent for use in chemical reactions.

Origin

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.

From Wiktionary, via Kaikki.org (CC BY-SA)