A sponge of the genus Xestospongia, especially Xestospongia testudinaria.

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.

Any cactus with an approximately barrel-like shape.

simple past tense and past participle of barrel race

present participle of barrel race

A race (contest) in which a horse must be ridden around standing barrels.

To ride a horse around standing barrels in a race.

plural of barrel race