Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A flint or pyrite used to strike a fire.
  • noun A fire-resistant stone, such as certain sandstones.

from the GNU version of the Collaborative International Dictionary of English.

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

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Iron pyrites, formerly used for striking fire.
  • noun A flint.
  • noun 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.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a sandstone that withstands intense heat; used to line fireplaces and furnaces and kilns
  • noun a piece of flint that is struck to light a fire

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

fire +‎ stone

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Examples

  • Scusteister var doubleclick_ad_params = 'wg=0;wa=51;wc=US;wi=anarchy;wi=theory;wi=biodiversity;wi=environmental;wi=issues;wi=farming;wi=stories;wi=feminism;wi=horses;wi=indie;jid=5568184;kw=postgenderism;kw=the;kw=singularity;kw=transalchemy;kw=shulamith;kw=firestone;kw=pregnancy;kw=transgenderism;c=jo;pt=jo;pc=l0';

    scusteister: The Fourth Wave: Transgenderism scusteister 2009

  • Vulpix is a Fire-type Pokémon that evolves into Ninetales via firestone.

    Archive 2009-02-01 Michael James 2009

  • In fact, I would argue that those numbers would be exactly the same even if Bill Clinton, for example, had not said a word and hadn't been this firestone of coverage.

    CNN Transcript Jan 25, 2008 2008

  • "Yes, it seems like this firestone produces the fire gas more slowly,"

    Dragon's Fire McCaffrey, Anne 2006

  • Seeing D'gan's eyes narrow angrily, he added hastily, "With eight men, I could have a mine producing a hundredweight of firestone every day within two sevendays."

    Dragon's Fire McCaffrey, Anne 2006

  • And it was a Dwarven hearth, after all, with firestone instead of wood glowing red in the grate, and most of the extra heat carried away up the flue.

    Reiffeins Choice 2006

  • A firestone fire glowed from a hearth near a pool the Dwarves had deepened with a low dam.

    Reiffeins Choice 2006

  • "If this were the old firestone, all the sea air would have combusted it long ago," Cristov remarked.

    Dragon's Fire McCaffrey, Anne 2006

  • Avender wanted to hear more about the pasties, but Nolo returned with fresh firestone and asked a question of Nurren before the boy could speak.

    Reiffeins Choice 2006

  • The firestone burned red and black, driving the damp chill from the room.

    Reiffeins Choice 2006

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