Pennsylvanian: Meaning and Definition of

Penn•syl•va•nian

1. of or pertaining to the state of Pennsylvania.
2. noting or pertaining to a period of the Paleozoic Era, occurring from about 310 to 280 million years ago and characterized by warm climates, swampy land areas, and the development of insects and reptiles: sometimes considered as an epoch of the Carboniferous Period. See table under

1. a native or inhabitant of Pennsylvania.
2. the Pennsylvanian Period or System.