Petroleum- Definition

Definition petroleum

petroleum noun
pe·​tro·​leum | \ pə-ˈtrō-lē-əm
, -ˈtrōl-yəm \
: an oily flammable bituminous liquid that may vary from almost colorless to black, occurs in many places in the upper strata of the earth, is a complex mixture of hydrocarbons with small amounts of other substances, and is prepared for use as gasoline, naphtha, or other products by various refining processes
merriam-webster.com/dictionary/petroleum