pennsylvanian

(noun, adjective)

adjective

1. Of, or pertaining to the state of Pennsylvania.

2. (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.

noun

1. from 310 million to 280 million years ago; warm climate; swampy land

Definition categories: time

2. a native or resident of Pennsylvania

Definition categories: person, american