POL US Abbreviation

Petroleum

It is the Greek word. It made of two words petro means Rock and oleum means oil. So it means the oil produced from rocks. It contains many hydrocarbons. OR Oily liquids or semisolids found in the earth, composed of hydrocarbons and primarily such non-metallic elements as sulfur, oxygen, nitrogen, etc. Though the composition of these dark, highly complex mixture varies, they are often lighter than water and highly flammable.