The Collaborative International Dictionary of English v.0.48:

Fusee \Fu*see"\, n. [See 2d Fusil, and cf. Fuse, n.]
   1. A flintlock gun. See 2d Fusil. [Obs.]
      [1913 Webster]

   2. A fuse. See Fuse, n.
      [1913 Webster]

   3.
      (a) A friction match for smokers' use having a bulbous
          head which when ignited is not easily blown out even
          in a gale of wind.
      (b) A kind of match made of paper impregnated with niter
          and having the usual igniting tip.
          [Webster 1913 Suppl.]

   4. A signal device, usually cylindrical, consisting of a tube
      filled with a composition which burns with a bright
      colored light for a definite time. It is used principally
      for the protection of trains or road vehicles, indicating
      an obstruction or accident ahead. Also called a flare or
      railroad flare.
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Fusee \Fu*see"\, n. [Etymol. uncertain.]
   The track of a buck. --Ainsworth.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fusee \Fu*see"\, n. [F. fus['e]e a spindleful, fusee, LL.
   fusata, fr. fusare to use a spindle, L. fusus spindle.]
   (a) The cone or conical wheel of a watch or clock, designed
       to equalize the power of the mainspring by having the
       chain from the barrel which contains the spring wind in a
       spiral groove on the surface of the cone in such a manner
       that the diameter of the cone at the point where the
       chain acts may correspond with the degree of tension of
       the spring.
   (b) A similar wheel used in other machinery. Fusel

WordNet (r) 3.0 (2006):

fusee
    n 1: a spirally grooved spindle in a clock that counteracts the
         diminishing power of the uncoiling mainspring [syn: fusee
         drive, fusee]
    2: a colored flare used as a warning signal by trucks and trains
       [syn: fusee, fuzee]
    3: a friction match with a large head that will stay alight in
       the wind [syn: fusee, fuzee]
    4: any igniter that is used to initiate the burning of a
       propellant [syn: fuse, fuze, fusee, fuzee, primer,
       priming]