from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Containing, made of, or resembling clay; clayey.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. pertaining to clay; made of, containing, or resembling clay

from the GNU version of the Collaborative International Dictionary of English

  • adj. Of the nature of clay; consisting of, or containing, argil or clay; clayey.

from The Century Dictionary and Cyclopedia

  • Of the nature of or resembling clay.
  • Containing a considerable amount of clayey matter: as, argillaceous earth.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. resembling or containing clay


From Latin argillāceus : argilla, argil; see argil + -āceus, -aceous.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From the Latin argillaceus, from argilla ‘clay’, from Greek αργιλλος. (Wiktionary)


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  • The soil of this vast depression is entirely argillaceous, and therefore impermeable, so that the waters remain there and make of it a region very difficult to cross during the hot season.

    -- Jules Verne, Michael Strogoff

    October 9, 2009

  • describes sedimentary rock that is made up of clay or silt particles.

    October 31, 2007