1. carboniferous

adjective. (ˌkɑːrbəˈnɪfɝəs) Relating to or consisting of or yielding carbon.
Synonyms
carbonaceous carbonic carbonous
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2. Carboniferous

noun. From 345 million to 280 million years ago.
Synonyms
Upper Carboniferous period Pennsylvanian Carboniferous period Lower Carboniferous Paleozoic era Lower Carboniferous period Missippian period Pennsylvanian period Mississippian Upper Carboniferous Paleozoic
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