flatstone
nounUK /ˈflæt.stəʊn/
US /ˈflæt.stoʊn/
A flatstone is a smooth, flat rock that you can skip on water or build with.
She found a perfect flatstone at the beach and skipped it across the waves.
RELATED WORDS
OTHER MEANINGS
2. A large flat stone used for paving paths or floors.
The garden path was made of flatstones set in the grass.
3. A stone slab used as a surface for grinding grain or preparing food.
The old mill used a round flatstone to grind wheat into flour.
4. A flat stone placed over a grave.
Wildflowers grew around the flatstone marking the old grave.