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From The Collaborative International Dictionary of English v.0.48:
Fuse \Fuse\, n. [For fusee, fusil. See 2d Fusil.] (Gunnery, Mining, etc.) 1. A tube or casing filled with combustible matter, by means of which a charge of powder is ignited, as in blasting; -- called also fuzee. See Fuze. [1913 Webster] Fuse hole, the hole in a shell prepared for the reception of the fuse. --Farrow. [1913 Webster] 2. (Mil.) a mechanism in a bomb, torpedo, rocket, or artillery shell, usually having an easily detonated explosive charge and activated by the shock of impact, which detonates the main explosive charge. Some fuses may have timing mechanisms, delaying the explosion for a short time, or up to several days after impact. Fuses activated by other mechanisms more sophisticated than impact, such as proximity or heat, are used in modern weapons such as antiaircraft or antimissile missiles. [PJC] Fuse