1. (n.) That branch of science which treats of the mechanical properties of air and other elastic fluids, as of their weight, pressure, elasticity, etc. See Mechanics.

2. (n.) The scientific study or knowledge of spiritual beings and their relations to God, angels, and men.

aerial photography aeroballistics aerodynamics aerogeology aerography aerology aeromechanics aeromedicine aerometry aeronautical meteorology aerophotography aerophysics aeroscopy aerospace research aerostatics air anemology atmosphere aviation technology avionics barometry climatography climatology fluid forecasting gas halogen gas hydrostatics inert gas kinematics kinetics long-range forecasting meteorology microclimatology nephology photometry rocketry supersonics weatherology