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

(cycling) A tube in the bicycle frame that connects the bottom bracket shell to the head tube.

An early gas discharge tube used to demonstrate the principles of electrical glow discharge.

(medicine) a device used to feed people who cannot eat or swallow, normally in the form of a tube passed through the nose or straight into the abdomen.

plural of tube shooter

(video games) A shoot 'em up game in which the player advances through a tube or tunnel while moving around its circumference.

(anatomy) Eustachian tube

(physics) Any device in which a flow of electrons (or ions) through a gas acts as a source of light

A well in which a stainless steel tube is bored directly down into an aquifer