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A river, about 250 km (155 mi) long, rising in the northern Czech Republic and flowing generally north along the border of Germany and Poland to the Oder River.


1. (Placename) Also called: Glatzer Neisse a river in SW Poland, rising on the northern Czech border, and flowing northeast to join the Oder near Brzeg. Length: about 193 km (120 miles). Polish name: Nysa
2. (Placename) Also called: Lusatian Neisse a river in E Europe, rising near Liberec in the Czech Republic and flowing north to join the Oder: forms part of the German–Polish border. Length: 225 km (140 miles)


(ˈnaɪ sə)

a river in N Europe, flowing N from the NW Czech Republic into the Oder River. 145 mi. (233 km) long.