Bunsen burner

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun 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.

from The Century Dictionary.

• See the nouns.

from the GNU version of the Collaborative International Dictionary of English.

• (Chem.) a kind of burner, invented by Professor Bunsen of Heidelberg, consisting of a straight tube, four or five inches in length, having small holes for the entrance of air at the bottom. Illuminating gas being also admitted at the bottom, a mixture of gas and air is formed which burns at the top with a feebly luminous but intensely hot flame.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a small laboratory gas burner whose air supply may be controlled with an adjustable hole

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a gas burner used in laboratories; has an air valve to regulate the mixture of gas and air