firestone (English, noun)
expansion: firestone (countable and uncountable, plural firestones)
Senses:
glosses: Iron pyrite, formerly used for striking fire.
tags: countable
uncountable
glosses: A flint.
tags: countable
uncountable
glosses: 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.
tags: countable
uncountable
Forms:
form: firestones
tags: plural