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fireclay

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Collins Concise English Dictionary © HarperCollins Publishers::

fireclay / ˈfaɪəˌkleɪ/

a heat-resistant clay used in the making of firebricks, furnace linings, etc

WordReference Random House Unabridged Dictionary of American English © 2026

fire′ clay′,

Building, Ceramicsa refractory clay used for making crucibles, firebricks, etc.

1810–20

'fireclay' also found in these entries (note: many are not synonyms or translations):

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