severite2Min.|ˈsɛvəraɪt| [Named from Saint-Sever (Landes, France) + -ite1. Cf. F. sévérite.] A synonym of lenzinite. 1823W. Phillips Introd.Min. (ed. 3) 87 Severite..occurs in small masses [etc.].1854Dana Syst.Min. (ed. 4) II. 504 Severite, a variety of halloysite.