A cewar ƙamus, kalmar "cobalt" suna ne da ke nufin wani sinadari mai alamar Co da lambar atomic 27. Cobalt wani ƙarfe ne mai wuya, silvery-launin toka wanda aka fi amfani da shi wajen samar da gami. maganadisu, da batura. Hakanan yana da mahimmanci a cikin abincin ɗan adam, wanda ake buƙata don samuwar bitamin B12. Ana samun Cobalt sau da yawa a cikin ma'adanai irin su cobaltite, smaltite, da erythrite, kuma ana amfani da shi a aikace-aikacen masana'antu daban-daban saboda abubuwan da ke cikinsa kamar narke mai yawa, kayan maganadisu, da iya jure yanayin zafi. Hakanan ana amfani da Cobalt a cikin launin shuɗi mai suna cobalt blue, wanda aka yi amfani da shi a cikin fasaha da yumbu tsawon ƙarni.