siegeniteMin.|ˈsiːgənaɪt| [f.Siegen(seeprec.).] A nickeliferous variety of linnæite. 1854Dana Syst.Min. (ed. 4) II. 68 Siegenite..is a Nickel-Linnæite.1866Watts Dict.Chem. IV. 44 Nickel-Linnæite. Siegenite. Linnæite..in which a considerable proportion of the cobalt is replaced by nickel.