rockplate
nounUK /ˈrɒkpleɪt/
US /ˈrɑːkpleɪt/
A rockplate is a flat piece of rock.
She found a smooth rockplate by the river.
OTHER MEANINGS
2. A hard, flat layer of rock under the ground.
The drill hit a solid rockplate deep underground.
3. A protective plate made of rock or stone, as on some animals.
The turtle's shell has a tough rockplate on top.
4. A flat stone used for cooking or serving food.
He served the bread on a warm rockplate.