from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of various medium-grained to coarse-grained metamorphic rocks composed of laminated, often flaky parallel layers of chiefly micaceous minerals.
from The Century Dictionary.
- noun 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.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Geol.) 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Any
crystallinerock having a foliatedstructure and hence admitting of ready division into slabsor slates.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun any metamorphic rock that can be split into thin layers
from The American Heritage® Dictionary of the English Language, 4th Edition
[French schiste, from Latin (lapis) schistos, fissile (stone), a kind of iron ore, from Greek skhistos, split, divisible, from skhizein, to split; see skei- in Indo-European roots.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
From L schistos lapis, "the stone that is easy to split", from Greek skhizein, "to split".
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