aeriform

Adjective
  1. Resembling air or having the form of air (synset 302270635)
    similar to: gaseous - existing as or having characteristics of a gas
    same as: airlike
  2. Characterized by lightness and insubstantiality;
    As impalpable or intangible as air (synset 300628872)
    "figures light and aeriform come unlooked for and melt away"; "aerial fancies"; "an airy apparition"; "physical rather than ethereal forms"
    similar to: insubstantial, unreal, unsubstantial - lacking material form or substance; unreal
    same as: aerial, aery, airy, ethereal

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