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schist

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Granite
Large Selection Of Tile, Marble And Granite. New Location In Van Nuys.
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schist

  [shist]
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–noun
any of a class of crystalline metamorphic rocks whose constituent mineral grains have a more or less parallel or foliated arrangement.
Origin:
1775–85; < NL schistus, L (lapis) schistos < Gk schistós divided, curdled, divisible, deriv. of schízein to split, with -tos adj. suffix
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Granite
Large Selection Of Tile, Marble And Granite. New Location In Van Nuys.
www.arizonatile.com
schist   (shĭst)   
n.  Any of various medium-grained to coarse-grained metamorphic rocks composed of laminated, often flaky parallel layers of chiefly micaceous minerals.

[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.]
schis'tose' (shĭs'tōs'), schis'tous (-təs) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

schist 
1795 (earlier schistus, 1601), from Fr. schiste, from L. schistos lapis "stone that splits easily" (Pliny), from Gk. skhistos "divided, separated," from skhizein "to split" (see shed (v.)). The rock splits easily in layers. Liddell and Scott says Gk. skhistos lithos was "probably talc."
Online Etymology Dictionary, © 2001 Douglas Harper
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