Definition of fusee
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 : a red signal flare used especially for protecting stalled trains and trucks
From the M-W Editors
Origin and Etymology of fusee
French fusée, literally, spindleful of yarn, from Old French, from fus spindle, from Latin fusus
First Known Use: 1622
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See words that rhyme with fusee Britannica.com: Encyclopedia article about fusee
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