aer ‧ o ‧ nau ‧ tics /ˌeərəˈnɔːtɪks $ ˌerəˈnɒː-/ BrE AmE noun [uncountable]
[ Date: 1700-1800 ; Language: Modern Latin ; Origin: aeronautica , from French aéronaute 'flyer' , from aéro- 'aero-' + Greek nautes 'sailor' ]
the science of designing and flying planes
—aeronautical adjective