olefiant gas

[ oh-luh-fahy-uhnt, oh-lee-fee-, oh-lef-ee- ]

noun

Origin of olefiant gas

1800–10; part translation of French gaz oléfiant, equivalent to olé- (<Latin oleumoil) + -fiant, present participle of -fier-fy; see -ant

One pound of common oil yields about 15 feet of olefiant gas.
Great Facts | Frederick C. Bakewell
This was at one time called the olefiant gas, because when mixed with chlorine an oily looking compound was produced.
A Dictionary of Arts, Manufactures and Mines | Andrew Ure
In the estimations of the composition of the gases given above, this vapour is included under olefiant gas.
A Dictionary of Arts, Manufactures and Mines | Andrew Ure
olefiant gas may therefore be expected to evolve a double quantity of carbon in its flame, which should emit a double light.
A Dictionary of Arts, Manufactures and Mines | Andrew Ure
A similar relation holds good between marsh gas and olefiant gas (ethylene).
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 3 | Various

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