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tube

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tube/ˈtuːb/
British/ˈtjuːb/noun
pluraltubes
tube
/ˈtuːb/British/ˈtjuːb/
noun
pluraltubes
Learner's definition of TUBE  
[count] 
: a long, hollow object that is used especially to control the flow of a liquid or gas
   b : an object shaped like a pipe
— see also inner tubetest tubevacuum tube
[count] : a soft, long, narrow container that has a small opening at one end and that contains a soft material which can be pushed out by squeezing
[count] : a thin, long, hollow part within an animal or plant
the tube US, informal : the television
— see also boob tubecathode-ray tube
[noncount]British : the system of trains that run underground in London

go down the tubes

informal
: to fail or become ruined
: to be wasted or lost

— tubelike

/ˈtuːbˌlaɪk/British/ˈtjuːbˌlaɪk/adjective
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