noun
slate; stone slab
Refers to a flat piece of stone, often used for writing, paving, or as a tablet.
昔の学校では石板にチョークで字を書いた。
In old schools, they wrote on slates with chalk.
庭に石板を敷いて小道を作った。
We laid stone slabs in the garden to make a path.
Compound of 石 (stone) and 板 (board, plate). The alternate form 石盤 uses 盤 (board, tray) with a similar meaning.