flue pipe

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

• noun An organ pipe with a lipped opening; a flue.

from The Century Dictionary.

• noun In organ-building. See pipe, 2.

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

• (Music) A pipe, esp. an organ pipe, whose tone is produced by the impinging of a current of air upon an edge, or lip, causing a wave motion in the air within; a mouth pipe; -- distinguished from reed pipe. Flue pipes are either open or closed (stopped at the distant end). The flute and flageolet are open pipes; a bottle acts as a closed pipe when one blows across the neck. The organ has both open and closed flue pipes, those of metal being usually round in section, and those of wood triangular or square.

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

• noun An organ pipe that produces sound through the vibration of air molecules, contrasted with reed pipe.

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

• noun organ pipe whose tone is produced by air passing across the sharp edge of a fissure or lip