Terahertz or THz may refer to:
Terahertz (unit), a unit of frequency, defined as one trillion (1012) cycles per second or 1012 hertz Terahertz radiation, electromagnetic waves within the ITU-designated band of frequencies from 0.3 to 3 terahertz Terahertz spectroscopy and technology Intel TeraHertz, a transistor design
See also Terahertz gap, a band of frequencies in the terahertz region of the electromagnetic spectrum