| • | A hollow cylinder, of any material, used for the conveyance of fluids, and for various other purposes; a pipe. |
| • | A telescope. |
| • | A vessel in animal bodies or plants, which conveys a fluid or other substance. |
| • | The narrow, hollow part of a gamopetalous corolla. |
| • | A priming tube, or friction primer. See under Priming, and Friction. |
| • | A small pipe forming part of the boiler, containing water and surrounded by flame or hot gases, or else surrounded by water and forming a flue for the gases to pass through. |
| • | A more or less cylindrical, and often spiral, case secreted or constructed by many annelids, crustaceans, insects, and other animals, for protection or concealment. See Illust. of Tubeworm. |
| • | One of the siphons of a bivalve mollusk. |
| • | To furnish with a tube; as, to tube a well. |
