from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to the Allegheny Mountains, or the region where they are situated. Also Al"le*gha`ny.
- adj. Pertaining to or designating a subdivision of the Pennsylvanian coal measure.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a river that rises in Pennsylvania and flows north into New York and then back south through Pennsylvania again to join the Monongahela River at Pittsburgh which is the beginning of the Ohio River
Sorry, no etymologies found.