aeronautics aeronautics /ˌɛroʊˈnɔːtɪks/

noun

1. The theory and practice of navigation through air or space  ( aeronautics , astronautics )
   the theory and practice of navigation through air or space
   
   

 aeronautic aeronautic /ˌɛroʊˈnɔːtɪk/

adjective

1. Of or pertaining to aeronautics  ( aeronautic , aeronautical )
   of or pertaining to aeronautics