#airfield

• 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.
• Aerodrome — A defined area on land or water (including any buildings, installations, and equipment) intended to be used either wholly or in part for the arrival, departure, and surface movement of aircraft. Unlike a fully developed commercial airport, it may feature simplified infrastructure, often being utilized for sports aviation, utility flights, flight schools, or military operations.
• Aerobeacon — A high-power beacon installed at an airfield, on a control tower, or along an airway, emitting intermittent or rotating light beams to guide pilots at night or in low visibility conditions. It serves as a crucial visual landmark for runway location and safe airspace navigation.
• Airport — A complex assembly of land, buildings, and technical installations specially designed to allow the takeoff, landing, ground handling, sheltering, and maintenance of aircraft, as well as the boarding, deboarding, and servicing of passengers or cargo processing. Its structure essentialy includes elements such as runways, taxiways, aprons, the control tower, and commercial terminals.
• Alexeni — A municipality and locality in Ialomița County, Wallachia, Romania, situated in the Bărăgan Plain, on the left bank of the Ialomița River. The settlement is historically and militarily renowned for its nearby former military airfield, later transformed into a utility aviation base and a space for various technical activities or aeronautical sporting events.
• Altiport — A small-sized airfield located in high mountainous regions, characterized by a short runway, often constructed on a steep incline to help aircraft decelerate during landing and accelerate quickly during takeoff.
• Aristogenesis — An idealistic evolutionary theory, formulated by paleontologist Henry Fairfield Osborn, stating that the evolution of living organisms is determined by the gradual emergence of new, superior adaptive genes and characters directly from the internal potential of the germ plasm, independent of natural selection or the direct influence of the environment. In modern biology, the term is considered historical, describing a predetermined biological improvement mechanism.