Fire"stone` (?; 110), n. [AS. frstan flint; fr fire + stan stone.]


Iron pyrites, formerly used for striking fire; also, a flint.


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.



© Webster 1913.

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