coal-dust
Stem of plants of the Gramineae.
Stem of grass or sedge; grass stem.
ETYM From Old Eng. dagh. Related to Dough.
1. A boiled or steamed pudding often containing dried fruit.
2. The partly decayed organic matter on the forest floor.
3. Fine coal; slack.
4. A stiff flour pudding steamed or boiled usually containing e.g. currents and citron.
plum duff