Definitions for "Schist"
Any crystalline rock having a foliated structure (see Foliation) and hence admitting of ready division into slabs or slates. The common kinds are mica schist, and hornblendic schist, consisting chiefly of quartz with mica or hornblende and often feldspar.
metamorphic rock characterized by strong foliation or schistosity.
Any of a number of sorts of rocks having a structure of thin parallel plates or leaves and a tendency to become separated into them, formed from other rocks by heat and pressure acting on certain materials.