coalcompounds
nounUK /ˈkəʊl ˈkɒmpaʊndz/
US /ˈkoʊl ˈkɑːmpaʊndz/
Coal compounds are tiny bits that stick together to make coal.
Scientists study coal compounds to learn what coal is made of.
OTHER MEANINGS
2. Chemical substances found in or made from coal.
The lab analyzed several coal compounds for the energy company.
3. Complex molecules formed from carbon and other elements in coal.
Coal compounds can include sulfur and nitrogen mixed with carbon.
4. Materials produced when coal is processed or burned.
Burning coal releases coal compounds into the air.