Pennsylvanian
/ˌpɛn.sɪlˈveɪ.ni.ən/ noun, adjective, proper noun
Forms Pennsylvanians the Pennsylvanian
- noun A native or resident of the state of Pennsylvania in the United States of America.
- adjective Of or pertaining to the state of Pennsylvania.
- 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.
- proper noun (geology) Any of the three Pennsylvanian epochs.
Synonyms
Pennsylvanian period Upper Carboniferous Upper Carboniferous period Keystone Stater
Sources: Wiktionary · WordNet 3.0 — from the Wiktionary entry “Pennsylvanian”, CC BY-SA 4.0. Details