Abensbero, a small town of Lower Bavaria, 18 m. S. W. of Ratisbon; pop. about 1,600. It is believed to have been the Abasinum of the Romans. It has a thermal spring, and contains the ruins of a fine castle. On April 20, 1809, Napoleon fought and defeated the Austrians near Abensberg, who lost 12 guns and 20,000 men, including the prisoners made on the following day. This was the precursor of the victories of Landshut and Eckmuhl.