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

  • n. A refractory brick, usually made of fire clay, used for lining furnaces, fireboxes, chimneys, or fireplaces.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a brick capable of withstanding high temperatures without deforming.

from the GNU version of the Collaborative International Dictionary of English

  • n. a refractory brick, capable of sustaining intense heat without fusion, usually made of fire clay or of siliceous material, with some cementing substance, and used for lining fire boxes, etc.
  • n. a brick made of fire clay, used for lining e.g. furnaces and chimneys.

from The Century Dictionary and Cyclopedia

  • n. A brick made of material which will not fuse readily in a kiln or furnace: used for lining furnaces, etc.

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

  • n. brick made of fire clay; used for lining e.g. furnaces and chimneys


Sorry, no etymologies found.


  • Typically, firebrick has a more yellowish colour and is more ceramic in appearance with little or no porosity to the brick.

    Care and maintenance of the fireplace

  • NOAH ADAMS: A small white house, a work shed and sales room, stacks of firewood around, a 30-foot-long kiln made from firebrick - here is the potter.

    Potter's Wood-Fired Kiln Sparks Friendships

  • PS - loved the firebrick one daisybones on March 04, 2008

    An Alphabetic List Of Colours And My Resulting Recollections

  • The top of my firebrick kiln AF-99 is always warm and just hanging out, wishing that it could be of use too.

    Better Scents in the Studio

  • I gave that up a couple years later when somebody slipped a firebrick in on me ...

    Long Ago and Far Away

  • The technique uses factory-built fireplaces that are lined with standard firebrick and look like masonry fireplaces.

    Homeowner Looks to Burn

  • Mushtaq made his knives using the lowest of low-tech methods in a traditional manner, hammering and forging the high-carbon tool steel by hand, using gas-fed firebrick ovens and open fires and anvils and suchlike that would have been at home back in the dawn of space flight, even before.

    Archive 2006-08-01

  • Right now, the power train stops at the big flywheel, but the engine is complete, and Yarrl has fired up the boiler at low temperatures several times to help temper the firebrick.

    The Magic Engineer

  • The wiry young man has never mentioned his abilities to sense the level of heat within the firebrick, or the order within the iron, nor does he intend to, not after his brief visit in Fairhaven.

    The Magic Engineer

  • It consists of a firebrick-lined steel drum resting on rolers.

    7. Frits and fritmaking


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  • "Few visitors came to that room, and when they did, they had a tendency to ask, "Is this the bricks?" meaning Carl Andre's Equivalent VIII, made from, and consisting of, 120 firebricks, which to this day remains an exciting touchstone for art skeptics and philistines everywhere. I was delighted to be able to say, "No, it's not the bricks. It's the stones.""

    The Lost Art of Walking by Geoff Nicholson, pp 65-66

    January 2, 2011