The Magyars were defeated by Otto I, Holy Roman Emperor.
The term T-wave may refer to  :. T wave , a portion of the recording of a heartbeat in an electrocardiogram. T wave. T wave. Terahertz radiation , electromagnetic radiation in the microwave band. Terahertz radiation. Terahertz radiation. T wave -LRB- seismic -RRB- , a form of seismic wave. T wave. T wave. seismic wave. seismic wave