- noting or pertaining to a period of the Paleozoic Era, including the Pennsylvanian and Mississippian periods as epochs, occurring from 345 million to 280 million years ago.
- producing carbon or coal.
- the Carboniferous Period or System.
- yielding coal or carbon
- of, denoting, or formed in the fifth period of the Palaeozoic era, between the Devonian and Permian periods, lasting for nearly 64 million years during which coal measures were formed
- the Carboniferous period or rock system
