Carboniferous period

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	Definition:		[n]  from 280 million to 345 million years ago
	Synonyms:		Carboniferous
	See Also:		geological period, Lower Carboniferous, Lower Carboniferous period, Missippian period, Mississippian, Paleozoic, Paleozoic era, Pennsylvanian, Pennsylvanian period, period, Upper Carboniferous, Upper Carboniferous period