Definition of carboniferous
1
: producing or containing carbon or coal
2
capitalized
: of, relating to, or being the period of the Paleozoic era between the Devonian and the Permian or the corresponding system of rocks that includes coal beds — see Geologic Time Table
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Merriam-Webster unabridged
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Time Traveler for carboniferous
The first known use of carboniferous was in 1799
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