inner tube

noun

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

Examples of inner tube in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Austrian company Tubolito is known for manufacturing bicycle inner tubes from TPU (thermoplastic polyurethane), a high-tech material originally used for smartphone speaker membranes. Maryna Holovnova, New Atlas, 8 May 2026 The trick is going into the eye to the retina which lines the back [of the eye], like an inner tube, and injecting the material [vector] between the photoreceptor nerve cells and the retinal pigment epithelium cells, which lie underneath. Lauren J. Young, Scientific American, 4 May 2026 During the warm summer months, rent an inner tube, fill an inflatable cooler with drinks (perhaps something from Guerneville’s very own Stumptown Brewery), and get out on the water at picturesque spots like the famed Johnson’s Beach. Cu Fleshman, Travel + Leisure, 23 Apr. 2026 Some escaped in boats crafted from the inner tubes of car tires. Sarah Moreno, Miami Herald, 8 Apr. 2026 See All Example Sentences for inner tube

Word History

First Known Use

1894, in the meaning defined above

Time Traveler
The first known use of inner tube was in 1894

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Cite this Entry

“Inner tube.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/inner%20tube. Accessed 12 May. 2026.

Kids Definition

inner tube

noun
: an inflatable ring-shaped rubber tube used inside a tire to hold air under pressure

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