aeriform aeriform /ˈɛərɪfɔːrm/

adjective

1. Characterized by lightness and insubstantiality; as impalpable or intangible as air  ( aerial , aeriform , aery , airy , ethereal , etherial )
   characterized by lightness and insubstantiality; as impalpable or intangible as air
    Figures light and aeriform come unlooked for and melt away
   figures light and aeriform come unlooked for and melt away
    Aerial fancies
   aerial fancies
    An airy apparition
   an airy apparition
    Physical rather than ethereal forms
   physical rather than ethereal forms
   
2. Resembling air or having the form of air  ( aeriform , airlike )
   resembling air or having the form of air