Therefore, "aero" generally refers to something related to air, aviation, or the atmosphere.
Here are some examples:
* Aerodynamics: The study of how air moves around objects.
* Aerospace: The field of technology and science related to aircraft and spacecraft.
* Aerobic: Relating to the presence of oxygen.
* Aerostat: A lighter-than-air aircraft (like a balloon).
* Aerogel: A very lightweight material with a porous structure.