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

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 tube-steak

plural of tube foot

(medicine) Also known as chest drain, thoracic catheter, tube thoracostomy, or intercostal drain. A tube inserted into the chest with the purpose of allowing the removal of air or fluid from the pleural cavity.

The Torricellian barometer.

A weighted tube that allows fuel to be drawn from the fuel tank of an aircraft even when it is flying upside down

(anatomy) The Eustachian tube.

Alternative form of Eustachian tube