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firebrick

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noun fire·brick \ˈfī(-ə)r-ˌbrik\

Definition of firebrick

  1. :  a refractory brick capable of sustaining high temperatures that is used especially for lining furnaces or fireplaces

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First Known Use of firebrick

1749

Learn More about firebrick

  1. See words that rhyme with firebrick Britannica.com: Encyclopedia article about firebrick

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