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.

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

(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