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

  • n. A rock fragment or grain resulting from the breakdown of larger rocks.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a fragment of rock that was broken from a larger rock or rock unit.

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

  • n. (geology) a constituent fragment of a clastic rock


From Greek klastos, broken, from klān, to break.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Back-formation from clastic. (Wiktionary)


  • His personal neomarxisme has sort-of wound down, with his work-sponsored clast taking up some of his blogging time - his other blogging home, neojaponisme also picks up fromwhere neomarxisme left off.

    Last chance for nominations for Japan Blogs of the Year

  • What I have done for the mini project is just selected one breccia clast/grain out of this thin section from a few cubic cm's of lunar meteorite to ananlyse.

    Snell-Pym » analysing the moon rock

  • I am also very intreged by the clast I have chosen to analyse - it looks like two main minerals interlocked in some sort of intergrowth way - each with its own specific selection of other mineral inclusions.

    Snell-Pym » analysing the moon rock

  • I am getting very excited about all this - its the thought of being able to tie in the mineralogy of crystals grains within a clast with a brecciated meteorite to lunar and even solar and possible even universe formation processes!

    Snell-Pym » analysing the moon rock

  • We chose which elements to map for, then defined the mapping area which was just slightly bigger than the clast.

    Snell-Pym » analysing the moon rock

  • DOBBS: Strong growth, and point of fact, wouldn't it be better for both parties, Democrats and Republicans, because hard-working Americans who are being hit by things like outsourcing, by lower paying jobs, loss of benefits, the middle clast squeeze in this country, is incontrovertible.

    CNN Transcript Apr 7, 2004

  • This speech is far more eloquent than any words that might be spoken of it and is so brimming with fundamental common sense that it might safely be clast as one of the great utterances of American Negro leaders.

    John Merrick. A Biographical Sketch

  • Coach Ivan Henjak has also promoted 20-year-old Redcliffe winger Mitch Rivett as 18th man for the clast at the Sydney Football Stadium wth some doubt remaining about Antonio Winterstein's fitness. | Top Stories

  • Dynasty collected during the program several 40kg samples from an ancient and vast coarse boulder "basal hematite-clast conglomerate" which is located on the margin between the Bangemall and Hamersley basin.

    Latest News - Yahoo!7 News

  • Next up is the culture blogs neomarxisme and clast: Despite two blogs for the price of one here, he just didn’t quite manage to get enough votes to win.

    Last chance for nominations for Japan Blogs of the Year


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