Part of speech: adjective

Of or like gas; aeriform; unsubstantial.

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Usage examples "gaseous":

  1. The latter consists in the continual tendency of their particles to separate from each other; and it is easy to imagine that this elasticity of gaseous bodies is the principal impediment to the operation of their chemical force; for this becomes more energetic as their particles approximate. - "Familiar Letters of Chemistry", Justus Liebig.
  2. This peculiar condition was not new to me, for I had seen, during my never- to- be- forgotten journey, many worlds without gaseous air. - "Life in a Thousand Worlds", William Shuler Harris.
  3. " The flame appears to be the exhaust of a fairly crude vessel," the interpretive bank finally reported, " propelled by ignition of some gaseous mixture." - "The Hitch Hikers", Vernon L. McCain.