fu·see also fu·zee 
(fy-zē)
(fy-zē)n.
1. A usually cone-shaped pulley with a spiral groove, used in a cord- or chain-winding clock to maintain even travel in the timekeeping mechanism as the force of the mainspring lessens in unwinding.
2.
a. A colored flare used as a warning signal for trucks and railroad trains.
b. A match with a large head capable of burning in a wind.
c. A combustible fuse for detonating explosives.
[From French fusée, spindle, rocket, flare, fuse, fusee, from Old French, spindleful of thread, from fus, spindle, from Latin fūsus.]