Pennsylvanian

  1. Noun.  An inhabitant or a resident of the state of Pennsylvania.
  2. Noun.  (geology) Any of the three Pennsylvanian epochs.
  3. 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.
  4. 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.