Since the eighteenth century it is understood as the "irrational fear of air currents", but today it is taken advantage of that the prefix aero- also refers to aviation to name the "fear of flying in aircraft". It is a word borrowed from the Greek 945; 951; 961; ( aer "air, atmosphere, fog" ) 966; 959; 946; 959; 962; ( fovos "fear" ) . See acrophobia.