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innertube

From Wiktionary, the free dictionary
See also: inner tube

English

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Etymology

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From inner +‎ tube.

Pronunciation

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  • Audio (US):(file)

Noun

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innertube (plural innertubes)

  1. In a pneumatic tire, the rubber liner that holds the air.
  2. This rubber liner, used without the tire on water as a flotation aid.
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