carbonate
nounUK /ˈkɑː.bən.eɪt/
US /ˈkɑːr.bən.eɪt/
A carbonate is a kind of salt made with carbon and oxygen that you can find in rocks and shells.
Chalk and limestone are rocks made mostly of carbonate.
RELATED WORDS
OTHER MEANINGS
2. A verb meaning to add carbon dioxide gas to a drink so it gets fizzy.
They carbonate the water to make it bubbly.
3. A chemical group made of one carbon atom and three oxygen atoms.
The carbonate ion has a charge of minus two.
4. A medicine that helps settle an upset stomach.
She took a carbonate tablet after lunch.