#fluid physics
- Aerometer — A physical instrument or laboratory apparatus used to measure the density, specific weight, or refractive index of air and other gases; a specialized hydrometer designed for compressible fluids, often operating based on hydrostatic buoyancy laws or by determining the mass of a fixed volume of gas.
- 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.
- Areometry — A branch of metrology and applied physics dealing with the study of techniques, methods, and mathematical principles for measuring the density or specific gravity of liquids using hydrometers. In a structural-engineering sense, areometria is based on Archimedes' principle regarding the equilibrium of floating bodies, serving as an essential quality control factor in chemical, petroleum, food, and winemaking industries.