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A river, about 105 km (65 mi) long, of northwest Italy flowing northward to the Po River. Hannibal defeated the Romans on the banks of the river in 218 bc.
Treb•bi•a(ˈtrɛb i ə)
a river in N Italy, flowing N into the Po at Piacenza: Romans defeated by Hannibal near here 218 B.C. 70 mi. (113 km) long.