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initiation [ɪ'nɪʃɪ'eɪʃ(ə)n] n
mil., abbr. initn
mil., logist. The action of a device used as the first element of an explosive train which, upon receipt of the proper impulse, causes the detonation or burning of an explosive item. 2. nuclear The action which sets off a chain reaction in a fissile mass which has reached the critical state generally by the emission of a "spurt" of neutrons. (FRA); Procedure by which the allocation is changed to an order and this order is forwarded to the concerned units. Each order is supposed to include the detailed instructions necessary for a successful accomplishment of the mission. (FRA)