Dictionary.com
definitions
  • synonyms

clay stone

or clay·stone

See more synonyms for clay stone on Thesaurus.com
noun Geology.
  1. argillite.
Show More

Origin of clay stone

First recorded in 1770–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for claystone

Historical Examples

  • Why should the schist pendant of the Tappock chamber be all right, if the claystone pendant of Dunbuie be all wrong?

    The Clyde Mystery

    Andrew Lang

  • We see them light their claystone pipes, and send forth clouds of blue vapour.

  • But there was more; close by the stone I noticed (although I think you didn't) a mark in the claystone.


British Dictionary definitions for claystone

claystone

noun
  1. a compact very fine-grained rock consisting of consolidated clay particles
Show More
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

claystone in Science

claystone

[klāstōn′]
  1. A fine-grained, dark gray to pink sedimentary rock consisting primarily of compacted and hardened clay. Claystone is similar to shale but without laminations.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.