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Definition of pennsylvanian - 3 dictionary results

Penn⋅syl⋅va⋅nian

  [pen-suhl-veyn-yuhn, -vey-nee-uhn]
Use pennsylvanian in a Sentence
–adjective
1. of or pertaining to the state of Pennsylvania.
2. Geology. 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.
–noun
3. a native or inhabitant of Pennsylvania.
4. Geology. the Pennsylvanian Period or System.
Origin:
1675–85; Pennsylvani(a) + -an
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Penn·syl·va·nian   (pěn'səl-vān'yən, -vā'nē-ən)   
adj.  

  1. Of or relating to Pennsylvania.

  2. Of or belonging to the geologic time, system of rocks, or sedimentary deposits of the sixth period of the Paleozoic Era, characterized by the development of the amniotic egg, the appearance of the first reptiles, and widespread swamp forests. See Table at geologic time.

n.  

  1. A native or resident of Pennsylvania.

  2. The Pennsylvanian Period. Also called Upper Carboniferous.


[After Pennsylvania.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Science Dictionary
Pennsylvanian   (pěn'səl-vān'yən)  Pronunciation Key 
The sixth period of the Paleozoic Era, from about 320 to 286 million years ago. Rock deposits from this period of time alternate between being marine and terrestrial in origin, and are rich in coal. Reptiles first appeared in the Pennsylvanian Period. See Chart at geologic time.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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