tube contains the following parts

tube

/tub/

noun
a hollow cylindrical shape
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Similar:

pipe

type of:
cylinder
noun
(anatomy) any hollow cylindrical body structure
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Similar:

tube-shaped structure

type of:
structure body structure anatomical structure complex body part bodily structure
noun
an electric railway operating below the surface of the ground (usually in a city)
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"in Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'"

Similar:

metro subway subway system underground

type of:
railway line railroad railroad line railway railway system
noun
conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
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tubing

type of:
conduit
noun
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
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Similar:

electron tube thermionic tube thermionic vacuum tube thermionic valve vacuum tube

type of:
electronic device

part of:
circuit electric circuit electrical circuit
verb
convey in a tube
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"inside Paris, they used to tube mail"

type of:
bring convey take
verb
place or enclose in a tube
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type of:
enfold envelop enwrap wrap enclose
verb
provide with a tube or insert a tube into
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type of:
render supply furnish provide
verb
ride or float on an inflated tube
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"We tubed down the river on a hot summer day"

type of:
ride

Parts of tube

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