Pennsylvanian
- Noun. An inhabitant or a resident of the state of Pennsylvania.
- Noun. (geology) Any of the three Pennsylvanian epochs.
- 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.
- Adjective. of, or pertaining to the state of Pennsylvania.
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This entry was last updated on RefTopia from its source on 3/20/2012.