flue

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

• noun A fishing net.
• noun A pipe, tube, or channel for conveying hot air, gas, steam, or smoke, as from a furnace or fireplace to a chimney.
• noun An organ pipe sounded by means of a current of air striking a lip in the side of the pipe and causing the air within to vibrate.
• noun The lipped opening in such a pipe.

from The Century Dictionary.

• noun A duct for the conveyance of air, smoke, heat, or gases.
• noun A pipe or tube for conveying heat to water in certain kinds of steam-boilers.
• noun A passage in a wall for the purpose of conducting heated air from one part of a building to another.
• noun [See etym.] The winding hollow of a sea-shell.
• noun In organ-building, a flute-pipe as distinguished from a mouth-pipe or reed-pipe.
• noun The coping of a gable or end-wall of a house, etc.
• To expand or splay, as the jambs of a window.
• noun Down or nap; waste downy matter, abounding in spinneries, lint-factories, etc.; downy refuse; fine hair, feathers, flocks of cotton, etc., that cling to clothes.
• Shallow.
• noun In whaling, the fluke or barb of a harpoon.
• noun A money of account of Morocco, of the value of one twenty-fifth of an English penny, or one thirteenth of a cent.
• noun Influenza.
• noun A fishing-net, stationary or used as a drag-net.

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

• noun Light down, such as rises from cotton, fur, etc.; very fine lint or hair.
• noun An inclosed passage way for establishing and directing a current of air, gases, etc.; an air passage.
• noun A compartment or division of a chimney for conveying flame and smoke to the outer air.
• noun A passage way for conducting a current of fresh, foul, or heated air from one place to another.
• noun (Steam Boiler) A pipe or passage for conveying flame and hot gases through surrounding water in a boiler; -- distinguished from a tube which holds water and is surrounded by fire. Small flues are called fire tubes or simply tubes.
• noun In an organ flue pipe, the opening between the lower lip and the languet.
• noun See under Boiler.
• noun the separating low wall between the flues and the laboratory of a reverberatory furnace.
• noun (Steam Boiler) a plate to which the ends of the flues are fastened; -- called also flue sheet, tube sheet, and tube plate.
• noun (Steam Boiler) the aggregate surface of flues exposed to flame or the hot gases.

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

• noun A pipe or duct that carries gaseous combustion products away from the point of combustion (such as a furnace).
• noun An enclosed passageway in which to direct air or other gaseous current along.

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

• noun flat bladelike projection on the arm of an anchor
• noun organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip
• noun a conduit to carry off smoke