barrel
1. A weight measure for portland cement in the US, corresponding to 376 pounds net; this measure is now obsolete. […]
An arch formed of a curved solid plate or slab, as contrasted with one formed with individual curved members or
The application of paint to small articles by tumbling them in a barrel containing paint.
1. A roof of semicylindrical section; capable of spanning long distances parallel to the axis of the cylinder. 2.A barrel