(cycling) The part of a tubular bicycle's frame in which the front fork steerer tube is mounted.

plural of lava tube

A natural conduit formed by flowing lava that moves beneath the hardened surface of a lava flow.

(aviation, historical) A speaking tube used for communication between the seats of early open-air aircraft.

plural of Gosport tube

plural of speaking tube

plural of neural tube

plural of microfuge tube

plural of audion tube

plural of discharge tube