Ma'anar ƙamus na "reagent" wani abu ne ko fili wanda ake ƙarawa a cikin tsarin don haifar da halayen sinadarai ko kuma gano kasancewar wani abu na musamman. Ma’ana, reagent wani abu ne da ake amfani da shi wajen nazarin sinadarai ko hadawa don haifar da wani abu ko kuma a gwada kasancewar wani abu a cikin samfurin.
