#dynamic

• Aeroelasticity — A branch of mechanics and aerospace engineering that studies the interactions between aerodynamic forces, the elastic forces of a solid body's structure, and its inertial forces, while in relative motion. This field is crucial in the design of high-speed aircraft and suspended bridges to prevent destructive structural instability phenomena, such as flutter or buffeting.
• Airbrake — A mobile aerodynamic device (retractable lifting surface, flap, or spoiler) mounted on the wings or fuselage of an aircraft or space vehicle, designed to be deployed into the airflow in order to increase drag resistance and rapidly reduce movement speed.
• Hovercraft — A self-propelled amphibious vehicle (hovercraft) capable of moving at a low altitude above water, land, swamps, or ice, by generating a continuous layer of compressed air beneath its hull (air cushion) which cancels its direct friction with the ground surface.
• Aeromechanics — A branch of fluid mechanics that studies the equilibrium and motion of air or other gases, as well as the mechanical behavior of solid bodies immersed in them or in relative motion to them. This major scientific field is structurally subdivided into aerostatics (the study of gases in equilibrium) and aerodynamics (the study of gases in motion).
• Aerometeorograph — A complex meteorological apparatus (recorder) specially designed to be mounted on board an airplane, aircraft meteorograph, or sounding balloon, used for the simultaneous graphic measurement and recording, on a rotating drum, of variations in barometric pressure, temperature, and humidity within the upper layers of the free atmosphere.
• 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.
• 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.
• Air-breathing jet — Utilizing the reaction of atmospheric air absorbed and expelled at high speed to produce the propulsion force necessary for movement; a system, engine, or aircraft based on burning a fuel in atmospheric oxygen. This type of structural propulsion is specific to modern turbojet airplanes, differing from rockets in that it does not carry its own oxidizer.
• Aerothermal — Relating to thermal phenomena occurring in the air or under the influence of air currents; concerning heat transformations within gaseous media. In modern technology, it describes advanced systems or heat pumps (air-to-water or air-to-air) that extract the thermal energy naturally stored in the outdoor air to provide building climate control.
• Aerothermodynamics — An advanced branch of fluid mechanics and thermodynamics that studies the behavior, physical properties, and thermal phenomena of airflows moving at extremely high speeds (supersonic and hypersonic). This structural science analyzes the complex interactions between aerodynamic forces and the intense heat transfer generated by gas friction, being essential for the design of rockets, space shuttles, and atmospheric re-entry vehicles.
• To flow toward — To flow or move in a single and constant direction, used especially to describe the movement of liquid masses. In medical and physiological fields, the term defines the process by which blood or other biological fluids gather in much larger quantities in a specific point, organ, or tissue.
• Inflow — The act of flowing or gathering; the massive, continuous, and convergent movement of a fluid, a crowd of people, or goods toward a single point. In medicine, it represents the abundant and rapid accumulation of blood or other biological fluids in a specific organ or tissue.
• To silt up — A rare verbal form or conjugation variant describing the process of accumulating alluvium, silt, and vegetative debris in a riverbed; to silt up or become blocked due to deposits brought by floods. As a transitive form, it defines the current's action of transporting and heaping solid materials at a critical point of the watercourse.
• Agitato — A musical term of Italian origin used as an execution directive, requiring the respective fragment or piece to be performed in an agitated, restless, tense, and dramatically passionate manner. In a structural compositional sense, it guides the tempo and dynamics of performance to convey a state of powerful emotional unrest.
• Regaining of agility — The act of becoming agile and its result; a structural or biological process through which a living being regains its speed, flexibility, and liveliness of movement. It represents a symbolic or physical transition from a state of total rest or sluggishness to a dynamic and vital behavior.
• Act of pleasing — The act of pleasing, or the state of being pleasing to someone; the psychological or social process of eliciting sympathy, approval, or benevolence from an individual or group through polite behavior, personal charm, or affability.
• Agrarian — The feminine form of the term agrar; relating to land ownership, farming tasks, agricultural laws, or rural social structures. Frequently used in crucial historical and economic collocations such as land reform.
• Agrophytocenosis — An artificial plant community created by humans on agricultural land, consisting of the main cultivated species and the accompanying spontaneous plant species (weeds) developing in that habitat. It represents the plant component of an agrocenosis and is characterized by a simplified structure and ecological dynamics heavily influenced by the applied agrotechnical treatments.
• Agulhas — A geographical proper name denoting Cape Agulhas (Cabo das Agulhas), the official southernmost tip of the African continent located in South Africa, marking the dividing line between the Atlantic and Indian Oceans; the term also names the famous warm western boundary ocean current (Agulhas Current) flowing southward along the east coast of Africa.
• Aiolostatic — An extremely rare scientific and technical term used to describe a state of static equilibrium or a configuration of forces within a fluid or gaseous medium under the influence of constant air currents or structured atmospheric pressures. This structural concept defines systems capable of maintaining their fixed position or native mechanical stability without extra dynamic energy consumption, through the precise mathematical compensation of mass vectors and aerodynamic forces exerted upon them.