firestone — English Dictionary

Noun

1. Iron pyrite, formerly used for striking fire.

   Usage

   • Countable
   • Uncountable

2. A flint.

   Usage

   • Countable
   • Uncountable

3. A heat-resistant stone that will withstand intense heat of a furnace, used for lining kilns, campfire rings, fireplaces and furnaces; especially, the sandstone at the top of the upper greensand in the south of England.

   Usage

   • Countable
   • Uncountable

   Examples

   More examples (1)

   On the descent the line is often in cuttings; some are high, such as at Scarcroft, where a cut through firestone and fireclay was necessary, and near Bardsey, where the line threads a deep tree-lined gorge.

Noun

1. a piece of flint that is struck to light a fire

   Broader terms

   flint

2. a sandstone that withstands intense heat; used to line fireplaces and furnaces and kilns

   Broader terms

   sandstone