petroleum

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petroleum

 [pĕ-tro´le-um]
a thick natural oil obtained from beneath the earth. It consists of a mixture of various hydrocarbons of the paraffin and olefin series.

pe·tro·le·um

(pĕ-trō'lē-ŭm),
A mixture of liquid hydrocarbons found in the earth in various parts of the world and believed to be derived from fossilized animal and plant remains; the source of petrolatum, in addition to its use for lighting and heating purposes.
Synonym(s): coal oil, rock oil
[L. petra, rock, + oleum, oil]

pe·tro·le·um

(pĕ-trō'lē-ŭm)
A mixture of liquid hydrocarbons found in the earth in various parts of the world believed to be derived from fossilized animal and plant remains.
[L. petra, rock, + oleum, oil]
References in periodicals archive ?
As the coal is introduced continuously into the process through closed hoppers, all the volatiles removed from the coal are captured and condensed into usable coal oil liquids.
The first stage of the CTC Mild Gasification Process in the production of a carbon char also produces as a byproduct about one barrel of coal oil liquids per ton of coal processed plus sufficient synthetic non-condensable gases that can be used to heat the entire process as based upon the quality of coal processed.
Then there was the disagreement over how much coal oil to add in total.
As I recall, we had three or four regular coal oil lamps before buying a Rayo design, which had a round wick.