Definition of slate pencil in English:

slate pencil

noun

historical
  • A pencil made of soft slate used for writing on slate.

    • ‘Eventually, the slate pencil was replaced by soft chalk, making it easier to write.’
    • ‘It might be interesting if you do a bit of extra research to find out exactly what a slate pencil was.’
    • ‘Vintage slate pencils become increasingly more difficult to find, so many become broken over the years.’
    • ‘The manufacture of slate pencils from soapstone is an industry as old as the manufacture of slates.’
    • ‘Slates and slate pencils were the forerunner of the whiteboard, and were the greatest paper saving device known.’