firestone

1. n. Iron pyrites, formerly used for striking fire; also, a flint. Source: opted

2. n. A stone which will bear the heat of a furnace without injury; -- especially applied to the sandstone at the top of the upper greensand in the south of England, used for lining kilns and furnaces. Source: opted

3. n. a piece of flint that is struck to light a fire Source: wordnet

4. n. a sandstone that withstands intense heat; used to line fireplaces and furnaces and kilns Source: wordnet

5. 1. Iron pyrites, formerly used for striking fire; also, a flint. 2. A stone which will bear the heat of a furnace without injury; -- especially applied to the sandstone at the top of the upper greensand in the south of England, used for lining kilns and furnaces. Ure. Source: webster

6. n. a piece of flint that is struck to light a fire n. a sandstone that withstands intense heat; used to line fireplaces and furnaces and kilns Source: ecdict

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