A kind of phytoclast consisting of micrometre-scale tubes with a banded internal ornamentation, known from terrestrial/freshwater settings from the early Silurian onwards.

A single-ended thimble tube in a boiler, with an internal tube to encourage circulation.

A tapered thermic syphon water-tube inserted in the furnace of a Lancashire boiler.

A tube that is entirely below the water level of a boiler during operation.

(electronics, becoming dated) In a television set, before the development of LED screens, the cathode ray tube which produced moving images on its surface.

(electronics) A type of vacuum tube that detects electromagnetic radiation in the range from ultraviolet to infrared, including the visible spectrum, and them amplifies the detection induced current into an output signal

plural of tube-steak

plural of tube foot

(firearms) An internally tapering metal cylinder attached to the muzzle of a shotgun, designed to constrict the spreading pattern of the shot pellets.

past participle of go down the tube