\Fu"si*ble\, a. [F. fusible. See {Fuse}, v. t.]
CapabIe of being melted or liquefied.
{Fusible metal}, any alloy of different metals capable of
   being easily fused, especially an alloy of five parts of
   bismuth, three of lead, and two of tin, which melts at a
   temperature below that of boiling water. --Ure.
{Fusible plug} (Steam Boiler), a piece of easily fusible
   alloy, placed in one of the sheets and intended to melt
   and blow off the steam in case of low water.