In an
explosive,
pyrotechnic device or military
munition, a
fuse (or
fuze) is the part of the device that initiates function. In common usage, the word fuse is used indiscriminately. However, when being specific (and in particular in a military context), the term
fuse, describes a simple pyrotechnic initiating device, like the cord on a
firecracker whereas the term
fuze is used to indicate a more sophisticated ignition device incorporating mechanical and/or
electronic components, such as a
proximity fuze for an
M107 artillery shell,
magnetic/
acoustic fuze on a
sea mine, spring-loaded
grenade fuze,
pencil detonator or
anti-handling device.