coalderivative
nounUK /ˌkəʊldɪˈrɪvətɪv/
US /ˌkoʊldɪˈrɪvətɪv/
A coal derivative is something made from coal.
Plastic can be a coal derivative made in factories.
OTHER MEANINGS
2. A chemical compound obtained by processing coal.
Scientists studied the coal derivative in the lab.
3. A material such as coal tar or coke that comes from coal.
The factory sells coal derivatives to other companies.
4. Anything produced as a secondary result of using coal.
Soot is a coal derivative that can dirty the air.