[1] : The Collaborative International Dictionary of English v.0.48

flue \flue\ fl=u, n. cf. of. flue a flowing, fr. fluer to
   flow, fr. l. fluere cf. fluent; a perh. a corruption of
   e. flute.
   1. an inclosed passage way for establishing and directing a
      current of air, gases, etc.; an air passage; esp.:
      a a compartment or division of a chimney for conveying
          flame and smoke to the outer air.
      b a passage way for conducting a current of fresh, foul,
          or heated air from one place to another.
      c 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.
          1913 webster

   2. in an organ flue pipe, the opening between the lower lip
      and the languet.
      webster 1913 suppl.

   flue boiler. see under boiler.

   flue bridge, the separating low wall between the flues and
      the laboratory of a reverberatory furnace.

   flue plate steam boiler, a plate to which the ends of the
      flues are fastened; -- called also flue sheet, tube
      sheet, and tube plate.

   flue surface steam boiler, the aggregate surface of flues
      exposed to flame or the hot gases.
      1913 webster
see also:
fluent fire tubes flue boiler boiler flue bridge flue plate 
flue sheet tube sheet tube plate flue surface 

[2] : The Collaborative International Dictionary of English v.0.48

tube \tube\, n. l. tubus; akin to tuba a trumpet: cf f. tube.
   1. a hollow cylinder, of any material, used for the
      conveyance of fluids, and for various other purposes; a
      pipe.
      1913 webster

   2. a telescope. "glazed optic tube." --milton.
      1913 webster

   3. a vessel in animal bodies or plants, which conveys a fluid
      or other substance.
      1913 webster

   4. bot. the narrow, hollow part of a gamopetalous corolla.
      1913 webster

   5. gun. a priming tube, or friction primer. see under
      priming, and friction.
      1913 webster

   6. steam boilers a small pipe forming part of the boiler,
      containing water and surrounded by flame or hot gases, or
      else surrounded by water and forming a flue for the gases
      to pass through.
      1913 webster

   7. zool.
      a a more or less cylindrical, and often spiral, case
          secreted or constructed by many annelids, crustaceans,
          insects, and other animals, for protection or
          concealment. see illust. of tubeworm.
      b one of the siphons of a bivalve mollusk.
          1913 webster

   8. elec. railways a tunnel for a tube railway; also
      colloq., a tube railway; a subway. chiefly eng.

   note: in the new york area, the subways running under the
         hudson river are sometimes referred to as the tube.
         webster 1913 suppl. +pjc

   capillary tube, a tube of very fine bore. see capillary.
      

   fire tube steam boilers, a tube which forms a flue.

   tube coral. zool. same as tubipore.

   tube foot zool., one of the ambulacral suckers of an
      echinoderm.

   tube plate, or tube sheet steam boilers, a flue plate.
      see under flue.

   tube pouch mil., a pouch containing priming tubes.

   tube spinner zool., any one of various species of spiders
      that construct tubelike webs. they belong to tegenaria,
      agelena, and allied genera.

   water tube steam boilers, a tube containing water and
      surrounded by flame or hot gases.
      1913 webster
see also:
priming friction tubeworm capillary tube capillary fire tube 
tube coral tubipore tube foot tube plate tube sheet 
flue tube pouch tube spinner tegenaria agelena 
water tube 

Sheet >> S Words
Sheet, definition of term: Sheet
sheet_pag1.html

Sheet Metal >> S Words
Sheet Metal, definition of term: Sheet Metal
sheet+metal_pag1.html

Sheet Iron >> S Words
Sheet Iron, definition of term: Sheet Iron
sheet+iron_pag1.html

Sheet Music >> S Words
Sheet Music, definition of term: Sheet Music
sheet+music_pag1.html

Sheet Pile >> S Words
Sheet Pile, definition of term: Sheet Pile
sheet+pile_pag1.html

Pitot Tube >> P Words
Pitot Tube, definition of term: Pitot Tube
pitot+tube_pag1.html

Pneumatic Tube >> P Words
Pneumatic Tube, definition of term: Pneumatic Tube
pneumatic+tube_pag1.html

Pollen Tube >> P Words
Pollen Tube, definition of term: Pollen Tube
pollen+tube_pag1.html

Picture Tube >> P Words
Picture Tube, definition of term: Picture Tube
picture+tube_pag1.html

Lead Sheet >> L Words
Lead Sheet, definition of term: Lead Sheet
lead+sheet_pag1.html

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