Bunsen burner Bun·sen burner (bŭn'sən)
A small laboratory burner consisting of a vertical metal tube connected to a gas source and producing a very hot flame from a mixture of gas and air let in through adjustable holes at the base.
A small gas burner used in laboratories. It consists of a vertical metal tube connected to a gas fuel source, with adjustable holes at its base. These holes allow air to enter the tube and mix with the gas in order to make a very hot flame.