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Tube Meaning: Underground, Container & Test Tube Uses (3 meaning)
Meaning 1：London underground (tube)
tube
/tjuːb/
n.
In British English, this word usually means the underground railway system, especially in London.
London underground
➕
/ˈlʌndən ˌʌndərˈɡraʊnd/
n.
In British English, this word refers to the subway system, especially the one in London.
📘 Details & Usage
📖 Root Explanation
From Latin 'tubus' meaning 'a pipe, tube'.
💡 Mnemonic
Imagine a tube-shaped tunnel: the Tube is a long, hollow passage underground.
📖 Example
To avoid the traffic, I decided to take the tube to work this morning.
To avoid the traffic, I decided to take the tube to work this morning.
🔗 Collocations
take the tube – to ride the London underground
tube station – a station of the underground railway
tube map – a diagram of the underground routes
🔄 Synonyms
underground (n.) – The subway system in British English, especially in London.
subway (n.) – An underground railway system in American English.
metro (n.) – An urban railway system, often underground, used in many cities.
📖 Cultural Story
The nickname 'Tube' for the London Underground originated from the deep cylindrical tunnels resembling pipes. The term 'tube' itself comes from Latin 'tubus'.
Meaning 2：cylindrical container (tube)
tube
/tjuːb/
n.
Any long, hollow, and usually round object, like the container for toothpaste or a cardboard roll.
cylindrical container
➕
/sɪˈlɪndrɪkəl kənˈteɪnər/
n.
A long, hollow, cylindrical object used for holding or transporting something, such as toothpaste or posters.
📘 Details & Usage
📖 Example
I rolled up the poster carefully and slid it into a cardboard tube for protection.
I rolled up the poster carefully and slid it into a cardboard tube for protection.
🔗 Collocations
toothpaste tube – a tube containing toothpaste
cardboard tube – a tube made of cardboard, e.g., from a paper towel roll
metal tube – a cylindrical metal container
🔄 Synonyms
Meaning 3：test tube (tube)
tube
/tjuːb/
n.
Specifically, a thin glass cylinder used in science experiments to hold, mix, or heat small amounts of liquid.
test tube
➕
/ˈtest tuːb/
n.
A thin glass cylinder used in scientific experiments to contain, mix, or heat small amounts of liquids.
📘 Details & Usage
📖 Example
In our chemistry class, we heated the blue liquid in a tube over a Bunsen burner and it turned green.
In our chemistry class, we heated the blue liquid in a tube over a Bunsen burner and it turned green.
🔗 Collocations
test tube – a small glass cylinder for experiments
test tube stand – a rack to hold test tubes upright
test tube holder – a tool to grip a test tube while heating
🔄 Synonyms
vial (n.) – A small container, typically cylindrical and made of glass, used for holding liquids.
sample tube (n.) – A tube used to store or transport a sample.
🌱 Derivatives
test-tube (adj.) – relating to a test tube, e.g., test-tube baby
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