The design, construction, mathematics and mechanics of aircraft and other flying objects / The theory and practice of aircraft navigation

plural of aeronaut

A person who travels through the air in an airship or balloon.

Of or pertaining to the scientific study of flight

Having to do with aerial navigation

In a aeronautical manner; with respect to aeronautics or aviation.

The practice of aeronautic travel.

A civilian agency of the government of the United States of America, charged with space and aeronautical research and space exploration.