Pronunciation: (ap"u-lā'chē-u, -chu, -lach'ē-u, -lach'u), [key]
1. Geol.a Paleozoic landmass, the erosion of which provided the sediments to form the rocks of the Appalachian Mountains.
2. a region in the E United States, in the area of the S Appalachian Mountains, usually including NE Alabama, NW Georgia, NW South Carolina, E Tennessee, W Virginia, E Kentucky, West Virginia, and SW Pennsylvania.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.