#military technology
- Amatol — A military explosive material composed of a homogeneous mixture of trinitrotoluene (TNT) and ammonium nitrate, widely used during World War I and World War II for filling artillery shells, aerial bombs, and naval mines.
- Amphibious nature — A structural property, mode of life, or characteristic of an organism, vehicle, or system to operate and survive in two distinct environments, typically terrestrial and aquatic. In biology, it designates the assembly of anatomical adaptations specific to amphibians, while in military technology, it refers to the operational capability of armored vehicles to execute rapid transitions between land and water without major reconfigurations.
- Applique armor — An additional protective armor, external metallic plate, or defensive reinforcing element mounted in front of the main armor of a warship or armored vehicle. Its structural role is to absorb the initial impact, fragment, or diminish the kinetic energy of enemy projectiles or shaped charges before they strike the core strength structure.
- Anti-missile — A defensive missile designed and used to intercept, destroy, or neutralize in flight another missile (ballistic, cruise, or tactical) launched by enemy forces. In a broad sense, the term characterizes structural elements of a defensive shield, sensor systems, and launch batteries integrated into an aerospace defense complex designed to protect a territory against guided vector attacks.
- Asdic — An acoustic underwater detection apparatus used on naval vessels for the structural localization of submarines, wrecks, or other submerged objects, based on the emission and reception of ultrasonic waves; a precursor system to modern sonar. It also represents a historical acronym derived from the British research committee that developed it during World War I.
- Self-destroying — Possessing the capacity, property, or function to automatically destroy itself; a device, system, or code structurally programmed to cause its own structural annihilation or definitive deletion under specific predefined conditions to protect confidential data or prevent accidents.