Pennsylvanian
noun
°An inhabitant or a resident of the state of Pennsylvania.
°Any of the three Pennsylvanian epochs.
adjective
°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.