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inner tube

noun

Definition of inner tube

:an inflatable usually ring-shaped rubber tube designed for use inside a pneumatic tire

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First Known Use of inner tube

1894

INNER TUBE Defined for English Language Learners

inner tube

noun

Definition of inner tube for English Language Learners

  • : a round tube that holds air inside a tire

Learn More about inner tube

  1. See words that rhyme with inner tube Nglish: Translation of inner tube for Spanish speakers

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