(chemistry) A tube to prevent explosion, or to control delivery of gases by an automatic valvular connection with the outer air; especially, a bent funnel tube with bulbs for adding those reagents which produce unpleasant fumes or violent effervescence.

An orogastric tube used to pump the stomach.

Alternative form of tubeworm

plural of tube worm

A tube for producing Lenard rays.

(historical) An early form of vacuum tube.

A vacuum tube, used in spectrum analysis, in which the part through which the discharge takes place is a capillary tube, thus producing intense incandescence of the contained gases. / A Crookes tube.

An improvement on the Crookes tube in which the electrons are produced by thermionic effect from a tungsten filament heated by an electric current.

microcentrifuge tube

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