A sponge of the genus Xestospongia, especially Xestospongia testudinaria.

plural of barrelhead

The flat top of a barrel that has been stood vertically.

plural of barrel vault

plural of barrel roof

(architecture) A simple roof having a curved, often semicircular cross section; used to span large distances in railway stations, churches, etc. Usually supported on columns.

A rough and tumble drinking establishment. / (music) A loud, percussive type of blues piano suitable for noisy bars or taverns.

plural of barrelful

As much as a barrel will hold. / A large amount.

plural of barrelful