fusee

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noun fu·see \fyü-ˈzē\

Definition of fusee

  1. 1 :  a conical spirally grooved pulley in a timepiece from which a cord or chain unwinds onto a cylinder containing the mainspring and which by its increasing diameter compensates for the lessening power of the spring

  2. 2 :  a red signal flare used especially for protecting stalled trains and trucks

Origin and Etymology of fusee

French fusée, literally, spindleful of yarn, from Old French, from fus spindle, from Latin fusus


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