aeriform

adjectives

resembling air or having the form of air
aeriform, airlike
characterized by lightness and insubstantiality; as impalpable or intangible as air
"figures light and aeriform come unlooked for and melt away"- Thomas Carlyle; "aerial fancies"; "an airy apparition"; "physical rather than ethereal forms"
aerial, aeriform, aery, airy, ethereal