A tube for conveying speech, especially from one room to another at a distance.

a type of butyrometer (used to estimate the proportion of butterfat in milk)

Of or pertaining to a type of electrical wiring consisting of insulated conductive copper wire affixed by porcelain hardware and protected in vulnerable areas by insulated cloth sleeving. Widely used in North America during the late 19th and early 20th centuries.

an empty cigarette consisting of a filter attached to a paper tube. / a tubular filter

A small cylindrical vessel used to heat substances in the flame of a Bunsen burner.

A tube for withdrawing a sample of liquid from a cask.

The procedure of tying the Fallopian tubes for the purpose of contraception.

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

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

A tube for the removal of mud and rock debris out to the surface of a caisson.