lavarock
nounUK /ˈlɑːvə rɒk/
US /ˈlɑːvə rɑːk/
Lava rock is hard, rough rock made when hot melted rock cools down.
We used lava rock in the garden to make the plants look nice.
SYNONYMS
OTHER MEANINGS
2. A light, porous rock used in gardens and landscaping.
She filled the pot with lava rock so the water could drain.
3. Rock formed from cooled lava, often used for grilling or saunas.
The restaurant cooks its steaks on hot lava rock.
4. A dark, rough stone used for decoration or building.
The path was lined with pieces of black lava rock.