Schist

shist, n. a term properly applied to crystalline rocks with a foliated structure, as mica-schist, hornblende-schist, .—indurated clay-rocks with a fi ile structure are sometimes erroneously described as schists.— adjs. Schistā′ceo us , slate-gray; Schist′ic , Schist′ous , Schist′ose , like schist: slaty.— n. Schistos′ity , quality of being schistose. [Fr. schiste —Gr. schistos — schizein , to split.]