Definify.com
Webster 1913 Edition
Flue
Flue
(flū)
, Noun.
[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. 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.
Flue
(flū)
, Noun.
[Cf. F.
flou
light, tender, G. flau
weak, W. llwch
dust. √84.] Light down, such as rises from cotton, fur, etc.; very fine lint or hair.
Dickens.