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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
- 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
- ozark chinquapin shrubby tree closely related to the Allegheny chinkapin but with larger leaves; southern midwestern United States
- white basswood American basswood of the Allegheny region
- monongahela 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
- fothergilla 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