A bronchus

(nautical) A metal tube mounted in a submarine or surface warship into which a torpedo may be loaded and launched through the hull or from the deck; a torpedo launcher.

An electronic amplifier device invented in 1906, the forerunner of the triode.

plural of tube steak

An early experimental electrical discharge tube by means of which cathode rays and X-rays were discovered.

plural of tube top

A locomotor appendage of an echinoderm consisting of a tube with longitudinal muscles, pressurized by water.

(slang) A marijuana cigarette.

(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.

(anatomy) The Eustachian tube.