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

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

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.

(inorganic chemistry) An analytical technique in which a sample is heated in a sealed tube, volatile metals being removed by sublimation to a cooler part of the tube from where they can be removed and weighed

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

The cardboard tube at the centre of a roll of toilet paper.

A glass tube for selecting a microscopic object in a fluid.

A small tube used in a laboratory for holding small volumes.

fulgurite