coalsubstances
nounUK /ˈkəʊlˌsʌbstənsɪz/
US /ˈkoʊlˌsʌbstənsɪz/
Coalsubstances are black, rocky bits of stuff that burn to make heat.
The old train engine ran on coalsubstances that glowed red in the firebox.
OTHER MEANINGS
2. Small pieces of charcoal used for cooking or heating.
We piled coalsubstances under the grill to cook the corn.
3. Leftover burnt material that still holds heat.
The coalsubstances in the fireplace kept the room warm all night.
4. Dark, coal-like lumps found in the ground.
The children dug up shiny coalsubstances near the riverbank.