英和和英

語源

fire +‎ stone

名詞

firestone (countable かつ uncountable, 複数形 firestones)

1. Iron pyrite, formerly used for striking fire.
2. A flint.
4. 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.
   • 1961 February, D. Bertram, “The lines to Wetherby and their traffic”, in Trains Illustrated, page 101:

     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.

アナグラム

• forestine, fresnoite, set on fire