SCHIST
schist
(noun) any metamorphic rock that can be split into thin layers
Source: WordNet® 3.1
Etymology
Noun
schist (countable and uncountable, plural schists)
Any of a variety of coarse-grained crystalline metamorphic rocks with a foliated structure that allows easy division into slabs or slates.
Anagrams
• stichs
Source: Wiktionary
Schist (shîst), n. Etym: [Gr. schiste. See Schism.] (Geol.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition