allegheny

Noun

Al=le=ghe=ny

WORDNET DICTIONARY

allegheny(n = noun.object) allegheny river - 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;

is a part of empire state, new york, new york state, ny, keystone state, pa, pennsylvania

is a kind of river

allegheny, a.

Of or pertaining to the Allegheny Mountains, or the region where they are situated. Also Al"le*gha`ny. [Webster 1913 Suppl.]
Pertaining to or designating a subdivision of the Pennsylvanian coal measure. [Webster 1913 Suppl.]