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nouna 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
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Definition that contains allegheny
- pittsburgh a city in southwestern Pennsylvania where the confluence of the Allegheny River and Monongahela River forms the Ohio River; long an important urban industrial area; site of Carnegie Mellon University and the University of Pittsburgh
- chinquapin shrubby tree closely related to the Allegheny chinkapin but with larger leaves; southern midwestern United States
- cottonwood American basswood of the Allegheny region
- sloe small sour dark purple fruit of especially the Allegheny plum bush
- shenandoah valley a large valley between the Allegheny Mountains and the Blue Ridge Mountains in northern Virginia; site of numerous battles during the American Civil War
- witch alder any of several deciduous low-growing shrubs of the genus Fothergilla having showy brushlike spikes of white flowers in spring and fiery red and orange autumn color; grows from Alabama to the Allegheny Mountains
- monongahela river a river that rises in northern West Virginia and flows north into Pennsylvania where it joins the Allegheny River at Pittsburgh to form the Ohio River
- tilia heterophylla American basswood of the Allegheny region
- ozark chinkapin shrubby tree closely related to the Allegheny chinkapin but with larger leaves; southern midwestern United States
- castanea ozarkensis shrubby tree closely related to the Allegheny chinkapin but with larger leaves; southern midwestern United States