#aviation term

• Aero — As a noun or adjective, it represents a short, colloquial, or commercial form for aviation, aeronautics, aerodynamics, or air transport. As a scholarly combining form (prefix), it originates from the Greek 'aer' and serves to form scientific, technical, or medical terms, indicating a direct connection with air, atmosphere, gases, or aircraft.
• 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.
• Aeroplane piloting — A rare historical term used during the early days of aviation to designate the art, technique, or act of navigating and piloting an aeroplane. This structural concept evoked the collective practical knowledge related to controlling fixed-wing aircraft, being later completely replaced by the modern term 'piloting' or included within the broader scope of aviation.
• Archaic aerostation — An archaic or obsolete linguistic variant of the term 'aerostație'; the art or technique of navigating the atmosphere using lighter-than-air craft. The term is encountered exclusively in old legal documents, literary magazines from the early 20th century, or early translations of scientific manuscripts from French.
• Altimeter — A flight instrument or portable device used in aviation, mountaineering, and surveying to measure and display the altitude of a point or an aircraft relative to a predetermined reference level (usually sea level or ground level), operating on barometric, radio, or laser principles.
• Land on water — A verbal form commonly used as the present indicative or subjunctive for the verb 'a amerisa' (to land on water); also, in informal medical or gynecological usage, it is a form erroneously derived or structurally confused with flow dynamics, but its primary technical meaning remains the execution of a controlled contact of an aircraft with a body of water. Academic standards recommend the infinitive 'a amerisa', while present inflections utilize the stem with 'z'.
• Trim — The structural position of static or dynamic equilibrium of a ship or aircraft, determined by the angle formed by its longitudinal axis with the horizontal plane. In naval architecture, it reflects the difference between aft and forward draft, while in aviation it indicates the aircraft's orientation relative to the flight path; in equitation, it denotes the rider's correct, firm, and stable posture in the saddle.
• Autorotation — An aerodynamic mechanism and emergency flight regime of a helicopter or rotary-wing aircraft, where the main rotor spins exclusively under the action of the ascending airflow, without engine power. This physical phenomenon allows the aircraft to descend in a controlled manner and land safely in the event of a major failure or complete failure of the propulsion system.