The term T-wave may refer to:
*
T wave, a portion of the recording of a heartbeat in an electrocardiogram
*
Terahertz radiation, electromagnetic radiation in the microwave band
*
T wave (seismic)
In electrocardiography, the T wave represents the repolarization of the ventricles. The interval from the beginning of the QRS complex to the apex of the T wave is referred to as the ''absolute refractory period''. The last half of the T wave ...
, a form of
seismic wave
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