Illustrated Glossary of Organic Chemistry

Oil: (1) A triglyceride which is a liquid at room temperature.


Glycerol oleate (triolein) is an oil (mp -4oC). It is an ester of glycerol and oleic acid.
(2) Petroleum.
An oil drilling platform.
   
An oil slick in the Gulf of Mexico from the Deepwater Horizon accident in 2010.
(3) Any substance that is a liquid at room temperature.