cask
nounUK /kɑːsk/
US /kæsk/
A cask is a big wooden barrel that holds things like water or juice.
The workers rolled the heavy cask into the cellar.
OTHER MEANINGS
2. A cask can mean the amount that a barrel holds.
They bought a whole cask of apple cider for the party.
3. A cask is a unit used for measuring liquids such as beer or oil.
The ship carried twenty casks of olive oil.
4. In biology, a cask can refer to a barrel-shaped structure, like a protein cask.
Scientists studied the tiny protein cask inside the cell.