rock coal
chiefly US in later use (now rare )
noun
A hard form of coal; anthracite.
Origin
Mid 18th century.
- plasminogen activator
- plasmoblast
- plasmocellular
- Plasmochin
- plasmocyte
- plasmocytic
- plasmocytoid
- plasmocytoma
- plasmocytosis
- plasmode
- plasmodesma
- plasmodesmal
- plasmodesmatal
- plasmodial
- plasmodic
- plasmodiocarp
- plasmodiocarpous
- plasmodiophorid
- plasmoditrophoblast
- plasmodium
- plasmodium-like
- plasmogamy
- plasmoid
- plasmolysability
- plasmolysable