air gas

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air gas (uncountable)

  1. A kind of gas made by forcing air through a volatile hydrocarbon, such as the lighter petroleums. The air is so saturated with combustible vapour as to be a convenient illuminating and heating agent.

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “air gas”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)