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argillite

[ ahr-juh-lahyt ]
/ ˈɑr dʒəˌlaɪt /
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noun

any compact sedimentary rock composed mainly of clay materials; clay stone.

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Origin of argillite

1785–95; <Latin argill(a) argil + -ite1
ar·gil·lit·ic [ahr-juh-lit-ik], /ˌɑr dʒəˈlɪt ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for argillite

argillite
/ (ˈɑːdʒɪˌlaɪt) /

noun

any argillaceous rock, esp a hardened mudstone
argillitic (ˌɑːdʒɪˈlɪtɪk), adjective
C18: from Latin argilla clay (from Greek argillos) + -ite 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for argillite

argillite
[ ärjə-līt′ ]

A highly compacted sedimentary or slightly metamorphic rock consisting primarily of particles of clay or silt. Argillite differs from mudstone in that it does not have the same fine laminations, and from shale and slate in that it is not fissile.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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