A long, hollow cylinder of metal, plastic, glass, etc. for holding or transporting something, chiefly liquids or gases
The underground railway system in London
Provide with a tube or tubes
A trachea or tracheole in an insect.
The main tube forming the body of an organ pipe or wind instrument.
The tube of the eyepiece in a telescope or microscope.
A tube that carries gas.
Mycology a tubular process emerging from a germinating fungal spore, typically developing into a hypha.
A discharge tube with a hard vacuum, or evacuated sufficiently for any remaining gas not to affect its performance.
(On a bicycle or tricycle) the hollow tube enclosing the steering column.
(In some early internal-combustion engines) a metal or porcelain tube, closed at the end, which projected from one end of the cylinder and was heated externally by a flame, so that it ignited the mixture forced into it during the compression stroke; usually attributive in hot-tube ignition.
A discharge tube containing neon; a neon lamp in the form of a tube.
A tube placed in a nostril for introducing fluid or gas; (Medicine) a nasogastric tube.
A tube that conveys oil; (Botany) = vitta.
A sock without a shaped heel
(Originally) a tube inserted into a well shaft, through which water or oil is extracted; (later) the inner casing in a driven well.
A woman’s tight-fitting strapless top made of stretchy material
A natural tunnel within a solidified lava flow, formerly occupied by flowing molten lava
A thin glass tube closed at one end, used to hold small amounts of material for laboratory testing or experiments
(In an echinoderm) each of a large number of small flexible hollow appendages protruding through the ambulacra, used either for locomotion or for collecting food and operated by hydraulic pressure within the water-vascular system
A round cake pan with a hollow, cone-shaped center, used for baking ring-shaped cakes
North American term for boob tube.
A well consisting of an iron pipe with a solid steel point and lateral perforations near the end, which is driven into the earth until a water-bearing stratum is reached, when a suction pump is applied to the upper end
A marine bristle worm, especially a fan worm, which lives in a tube made from sand particles or in a calcareous tube that it secretes
The calcareous or sandy tube of some sedentary marine worms, such as fan worms
A device for generating X-rays by accelerating electrons to high energies and causing them to strike a metal target from which the X-rays are emitted
A small high-frequency vacuum tube resembling an acorn in both size and shape.
Photography (in a camera or scientific instrument) a tube along which light is directed from a lens or source into a device holding the film or plate (now chiefly historical).
Botany a nectar spur or corolla tube (rare).
An electron tube in which a (visible or invisible) image is formed on a photoemissive surface, causing it to emit a corresponding flow of electrons which may then be used to reproduce the image in a different form.
A small-bore rifle barrel that can be inserted in a large-bore rifle or shotgun for shooting practice.
The barrel of a mortar.
Embryology a neural tube.
A vacuum tube that produces an electrical signal corresponding to an optical image formed in or on it; a camera tube.
A cardboard tube in which documents, plans, etc., can be sent by post.
= power valve.
A tube out of which a rocket is fired.
A tube used for tissue or cell culture which is continually rotated in order to immerse the cells periodically in nutrient solution.
A tube designed to provide an outlet or inlet for gases, fluids, etc.
A tube aligned parallel to the flow of a fluid, closed at the end facing the flow, and having holes along its length, so as to register static pressure or speed of flow; specifically one forming part of a pitot-static head.
A close-fitting dress hanging straight from the shoulders; a chemise dress.
A tight, close-fitting skirt, often made from a single piece of knitted or elasticized material.
= voice pipe.
A gas-discharge tube used, especially in photography, to provide an electronic flash when a current is suddenly passed through it
A separate inflatable tube inside a pneumatic tyre
(In an embryo) a hollow structure from which the brain and spinal cord form. Defects in its development can result in congenital abnormalities such as spina bifida
An open-ended right-angled tube pointing in opposition to the flow of a fluid and used to measure pressure
A hollow tube which develops from a pollen grain when deposited on the stigma of a flower. It penetrates the style and conveys the male gametes to the ovule
A series of sieve tube elements placed end to end to form a continuous tube