What is the meaning of Pennsylvanian?

From 310 million to 280 million years ago; warm climate; swampy land.
- synonyms: Pennsylvanian period, Upper Carboniferous, Upper Carboniferous period
A native or resident of Pennsylvania.
- synonyms: Keystone Stater

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APA	WordNet. (2010). pennsylvanian. Retrieved September 25, 2026, from http://smartdefine.org/pennsylvanian/definitions/1228664
Chicago	WordNet. 2010. "pennsylvanian" http://smartdefine.org/pennsylvanian/definitions/1228664 (accessed September 25, 2026).
Harvard	WordNet 2010, pennsylvanian, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/pennsylvanian/definitions/1228664>.
MLA	WordNet. "pennsylvanian" 23 October 2010. Web. 25 September 2026. <http://smartdefine.org/pennsylvanian/definitions/1228664>

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