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- Rhymes: -eɪniən
Pennsylvanian (plural Pennsylvanians)
- A native or resident of the state of Pennsylvania in the United States of America.
- (geology) Any of the three Pennsylvanian epochs.
geology: Pennsylvanian epoch
Pennsylvanian (not comparable)
- Of, or pertaining to the state of Pennsylvania.
- (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.
geology: of a Pennsylvanian epoch