Pennsylvanian

Penn·syl·va·nian  (pnsl-vnyn, -vn-n)

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.]

---

Pennsylvanian  (pnsl-vnyn)

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.

Thesaurus

Noun	1.	Pennsylvanian - from 310 million to 280 million years ago; warm climate; swampy land Pennsylvanian period, Upper Carboniferous, Upper Carboniferous period Carboniferous, Carboniferous period - from 345 million to 280 million years ago
	2.	Pennsylvanian - a native or resident of Pennsylvania Keystone Stater American - a native or inhabitant of the United States