| Definitions | | Pennsylvanian |
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proper noun (Pennsylvanians, -)
- An inhabitant or a resident of the state of Pennsylvania.
- (geology) Any of the three Pennsylvanian epochs.
adjective
- (geology) of any of the three geologic epochs (lower, middle and upper) within the Carboniferous period from 318 to 299 million years ago; marked by a high oxygen atmosphere and the rise of reptiles and winged insects.
- of, or pertaining to the state of Pennsylvania.
Etymology: Pennsylvani(a) + -ian, (i)an
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