#aerospace

• Amphibious aircraft — Capable of operating, taking off, landing, or moving with equal efficiency both in the air and on the surface of water or solid ground. As a noun, it designates a seaplane equipped with a retractable wheeled landing gear, allowing it to use terrestrial airfields as easily as natural water runways.
• Airbase — A military airbase or a large aeronautical complex comprising airfields, takeoff and landing runways, hangars, repair shops, fuel and ammunition depots, as well as the logistical infrastructure necessary for the stationing, maintenance, and operation of military or commercial aircraft.
• Aerocell — A porous, insulating, and ultra-light material characterized by a cellular structure in which the liquid phase of a gel has been completely replaced with a gas (usually air) without the solid network collapsing. It is widely used in industrial thermal insulation, the aerospace industry, and construction due to its extremely low thermal conductivity.
• Aero club — A sports association, club, or aeronautical organization aimed at promoting, practicing, and developing recreational flight activities, piloting, skydiving, gliding, or aeromodelling. The term also designates the material base of such an association, including the airfield, hangars, aircraft, and training facilities.
• Aerospace — Relating simultaneously to airspace (atmospheric) and cosmic space (extra-atmospheric); located within these spaces or adapted to operate in both environments. The term describes technologies, vehicles, research missions, or related industries that integrate classical aviation and orbital or interplanetary spaceflight.
• Aerodyne — Any aircraft heavier than air, whose support and lift in the Earth's atmosphere are provided exclusively by the dynamic forces exerted by air on its lifting surfaces (fixed wings or moving rotors) during travel. The classification includes airplanes, helicopters, gliders, and drones, representing the opposite of aerostats.
• Aerodynamics — A branch of fluid mechanics that studies the laws governing the motion of air or other gases, as well as the forces exerted by them on solid bodies in relative motion to them. This scientific field governs the design of aircraft, rockets, and terrestrial vehicles by optimizing lift and drag forces.
• Aerodynamicist — An engineer or researcher specialized in the field of aerodynamics; a specialist who deals with the study, design, optimization, and testing of the behavior of solid bodies (aircraft, cars, rockets) moving through airflows or gases. This activity includes the use of advanced computer simulations and experimental tests in wind tunnels to reduce drag resistance.
• Aerodrome craft — An archaic, rare, or conceptual technical term used to describe an experimental heavier-than-air aircraft, an early prototype of a self-propelled airplane, or a covered dome-shaped structure designed for sheltering and protecting flight machines inside an airfield.
• Aerodontalgia — A pathophysiological disorder manifested by an acute, violent, and sudden toothache, directly triggered by variations in barometric pressure during high-altitude flight; it occurs due to the expansion of air or gases trapped underneath poorly fitted fillings or within deep untreated cavities.
• Avionics — A specialized branch of applied electronics and aeronautical engineering dealing with the design, manufacturing, installation, and maintenance of electronic systems and equipment used on board aircraft and rockets (navigation systems, communications, autopilot, radars, and cockpit sensors).
• Aviation medicine — A specialized, interdisciplinary branch of medicine that studies the physiological, psychological, and pathological effects exerted by high-altitude flight and variations in altitude or barometric pressure on the human body. This discipline establishes medical selection criteria, fitness standards for pilots, and emergency assistance during air transport.
• Airmobile — As an adjective, it describes military forces, equipment, or tactical units capable of being rapidly transported and deployed through the air using aircraft (especially helicopters); as a neuter noun, it represents a conceptual or experimental hybrid vehicle designed to drive on roads and fly in airspace.
• Aeronaut — A specialized or authorized person who navigates through the atmosphere using an aerostat, an airship, or a balloon; a pilot or member of the flight crew operating an aircraft lighter than air. In a historical sense, the term designates the pioneers of atmospheric flights who paved the way for airspace exploration.
• Aeronautical — Belonging to aeronautics or relating to aerial navigation, as well as the study, design, construction, and operation of aircraft. This term describes structural, regulatory, industrial, or scientific elements essential for vehicle flight within Earth's atmosphere, ranging from airplanes and helicopters to complex propulsion and control systems.
• Aeronautics — The science, technology, and collective industries dealing with the design, construction, testing, operation, and navigation of aircraft within Earth's atmosphere. The field encompasses complex disciplines such as aerodynamics, aerospace structures, propulsion, and avionics systems, aiming to optimize the safe movement of vehicles lighter or heavier than air.
• Aircraft — Any technical apparatus capable of sustaining itself in the atmosphere and moving through airspace due to the reactions of the air, other than its reactions against the earth's surface. This vast category structurally includes both aircraft lighter than air, such as balloons and airships, and aircraft heavier than air, such as airplanes, helicopters, and gliders.
• Aeropause — A transition zone or upper region of Earth's atmosphere, located beyond the dense layers, where the air density becomes so low that it can no longer provide lift for conventional aircraft or support sound wave propagation. This structural threshold marks the functional limit of classical aviation and the beginning of upper aerospace, where flight is governed exclusively by orbital mechanics.
• Airshow — A large-scale international exhibition, trade fair, or aviation show organized periodically, where global manufacturers present the newest airplanes, helicopters, drones, propulsion systems, and aerospace technologies to the public and institutional buyers. This structural event includes both indoor exhibition booths and dynamic flight demonstrations or aerial acrobatics.
• Aerospace — Belonging or relating simultaneously to Earth's atmosphere and the outer space beyond it, or to the design and construction of vehicles intended for navigation in both environments. This term describes an extremely complex industrial and scientific branch, structurally encompassing aerodynamic research, rocket engineering, satellite flight, and extra-atmospheric navigation systems.