Tubular (adjective)

1. Having the form of a tube or tubes; cylindrical in shape.
2. Relating to or designed for use with tubes, especially in a plumbing system.
3. Relating to or resembling a tube.
4. Shaped like a tube, especially in a circular cross section.

Origin:

Late middle english (as a noun): from latin tubulus "small tube".

Examples:

1. The oil filter has a tubular shape.
2. The drinking straws are made from tubular plastic.
3. The pipes in a plumbing system are tubular in shape.
4. A tubular organ pipe has a cylindrical shape.
5. Tubular steel is used for reinforcing concrete structures.