noun Download 🔗Share In a pneumatic tire, the rubber liner that holds the air. Examples : "The bicycle tire was flat because the innertube had a hole in it. " material vehicle part technology Chat with AIVocabulary GamePractice Reading
noun Download 🔗Share This rubber liner, used without the tire on water as a flotation aid. Examples : "We used an innertube to float down the lazy river at the water park. " material aid sport nautical Chat with AIVocabulary GamePractice Reading