argillite

[ ahr-juh-lahyt ]
/ ˈɑr dʒəˌlaɪt /

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

OTHER WORDS FROM argillite

ar·gil·lit·ic [ahr-juh-lit-ik] /ˌɑr dʒəˈlɪt ɪk/, adjective
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Example sentences from the Web for argillite

British Dictionary definitions for argillite

argillite
/ (ˈɑːdʒɪˌlaɪt) /

noun

any argillaceous rock, esp a hardened mudstone

Derived forms of argillite

argillitic (ˌɑːdʒɪˈlɪtɪk), adjective

Word Origin for argillite

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.