Definition of “inner tube” - English Dictionary

English

(Definition of “inner tube” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

“inner tube” in American English

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inner tubenoun [ C ]

us /ˈɪn·ər ˌtub/

a round rubber tube filled with air that fits inside a car or bicycle tire

(Definition of “inner tube” from the Cambridge Academic Content Dictionary © Cambridge University Press)