inner tube
noun
a doughnut-shaped, flexible rubber tube inflated inside a tire to bear the weight of a vehicle.
Also called
tube.
Origin of inner tube
First recorded in 1890–95
Words nearby inner tube
inner planet,
inner product,
inner sanctum,
inner space,
inner temple,
inner tube,
inner woman,
inner-directed,
inner-tuber,
inner-tubing,
innermost
British Dictionary definitions for inner tube
inner tube
noun
an inflatable rubber tube that fits inside a pneumatic tyre casing