warhead, implosion That part of a missile warhead installation which includes the nuclear components, sphere case, high explosive system, detonators, detonator cables, firing element, firing switch, internal electrical circuits, in-flight insertion mechanism ( if any ), tritium gasboosting system (if any), and whatever hardware required to hold these parts together, warhead installation A missile warhead plus its adaption kit. XW A generic prefix designating a specific ee experimental model of an atomic warhead, 329 AFwWHO SWEH -2-003, a