Glossary & References / Keywords List / Definitions:

Term to be defined Definition Synonyms & Keywords
Oils - "Any of various thick, viscous, typically flammable liquids which are insoluble in water but soluble in organic solvents and are obtained from animals or plants;

- also -

A viscous liquid derived from petroleum, especially for use as a fuel or lubricant." (B125)

Further information about various types of oil is provided in: