petroleum

name

1. A place in the United States:
2. A place in the United States:
3. A place in the United States:

noun

Etymology: Learned borrowing from Medieval Latin petroleum. Doublet of petrol.

1. A flammable liquid ranging in color from clear to very dark brown and black, consisting mainly of hydrocarbons, occurring naturally in deposits under the Earth's surface.

   “petroleum-based products”

   “Coal and petroleum do not occur hap-hazard in nature, but the aggregate occurrence of each product in any region forms a definite, limited horizon, which, in its continuance, is independent of the bedding plane.”