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noun. A hollow cylinder, especially one that conveys a fluid or functions as a passage.

noun. An organic structure having the shape or function of a tube; a duct.

noun. A small flexible cylindrical container sealed at one end and having a screw cap at the other, for pigments, toothpaste, or other pastelike substances.

noun. The cylindrical part of a wind instrument.

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noun. An electron tube.

noun. A vacuum tube.

noun. The lower, cylindrical part of a gamopetalous corolla or a gamosepalous calyx.

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noun. A tunnel.

noun. An underground railroad system, especially the one in London, England.

noun. The elongated space inside a wave when it is breaking.

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noun. An inner tube.

noun. An inflatable tube or cushion made of rubber or plastic and used for recreational riding, as behind a motor boat or down a snow-covered slope.

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noun. Television.

noun. A television set.

noun. The fallopian tubes.

intransitive verb. To provide with a tube; insert a tube in.

intransitive verb. To place in or enclose in a tube.

intransitive verb. To ride or float on an inflated tube for recreation.

idiom. (tubes/tube) Into a state of failure or ruin.

To furnish with a tube or tubes.

To receive or inclose in a tube.

A pipe or hollow cylinder, especially when of small size and used as a conduit for liquids, or for containing liquids, as in some forms of scientific apparatus.

Specifically, the main body of a musical instrument of either the wood wind or the brass wind group. The bore of such instruments is usually conical, but sometimes cylindrical.

In anatomy and zoology, a hollow tubular organ; a pipe, canal, or duct conveying fluid or gas; especially, a pipe which seems to be empty—that is, conveys air: as, the bronchial tubes; the Eustachian tube.

In botany, any hollow elongated body or part of an organ: applied especially to a gamopet-alous corolla or gamosepalous calyx, also to a united circle of stamens (see cut 9 under stamen).

A priming-tube.

A telescope, or that part of it into which the lenses are fitted.

The barrel of a chain-pump.

A small receptacle of drawn lead, of approximately tubular form, closed at the bottom by bending it over twice or three times on itself, and having a screw-cap at the top, used to hold pigments or similar matter in a semifluid condition.

noun. A city subway in the form of a tunnel.

noun. A hollow cylinder, of any material, used for the conveyance of fluids, and for various other purposes; a pipe.

noun. A telescope.

noun. A vessel in animal bodies or plants, which conveys a fluid or other substance.

noun. The narrow, hollow part of a gamopetalous corolla.

noun. A priming tube, or friction primer. See under Priming, and Friction.

noun. 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.

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noun. 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.

noun. One of the siphons of a bivalve mollusk.

noun. A tunnel for a tube railway; also (Colloq.), a tube railway; a subway.

noun. a tube of very fine bore. See Capillary.

noun. a tube which forms a flue.

noun. Same as Tubipore.

noun. one of the ambulacral suckers of an echinoderm.

noun. a flue plate. See under Flue.

"When an ovum is matured, it escapes from the ovary into the narrow tube referred to, called the _Fallopian tube_, and passes down into the cavity of the uterus."