This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. Any of various medium-grained to coarse-grained metamorphic rocks composed of laminated, often flaky parallel layers of chiefly micaceous minerals.

n. Any crystalline rock having a foliated structure and hence admitting of ready division into slabs or slates.

n. 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.

n. A rock the constituent minerals of which have assumed a position in more or less closely parallel layers or folia, due not to deposition as a sediment, but—in large part, at least—to metamorphic action, which has caused a rearrangement or imperfect crystallization of the component minerals, or the formation of new ones, these. in the course of the process, having assumed the parallel arrangement characteristic of the rock.

n. any metamorphic rock that can be split into thin layers

"Through the years, the wineries have carved amazing steep terraces for grape growing along the banks of the Douro, and there is a unique soil called schist."

metamorphic rock   

callaway schist    moine schist    blocky schist    gembloux schist    protozoic schists    przibram scnists    goffered schist    matagne schists    knotted schist   

foliation   

schistous    schistocity   

Liszt    assist    cist    coexist    consist    cyst    delist    desist    dismissed    enlist   

schistus    slate    greenstone    basalt    sandstone    gneiss    shale    freestone    quartzite    marl