Definition of firestone in English:

firestone

noun

  • Stone that can withstand fire and great heat, used especially for lining furnaces and ovens.

    • ‘The cooking surface is made of fire stone.’
    • ‘The oven is to be formed of wrought or cast iron, the under part being lined with fire-stone.’

Pronunciation:

firestone

/ˈfī(ə)rˌstōn/