silex

/ˈsaɪlɛks/
noun
  1. A hard, fine-grained stone (a type of quartz) that can be used to make sparks or sharp tools; flint.
    • Striking silex against steel produces a shower of sparks for starting a fire.
    • The archaeologist found a silex blade buried near the ancient hearth.
    • Early humans used silex to create knives and arrowheads.
  2. A brand name for a type of heat-resistant glassware, often used for laboratory equipment or cookware.
    • My grandmother's silex coffee pot is still in perfect condition.
    • The lab ordered new silex flasks for the experiment.
    • The chemist poured the acid into a silex beaker.
Synonyms
What does "silex" mean? | whatsthatwordmean | whatsthatwordmean