THD

THD may refer to:

• Doctor of Theology (Th.D. or D.Th. or D.Theol.)
• Thai Smile (ICAO code)
• Thames Ditton railway station, Surrey, England (National Rail station code)
• That Handsome Devil, an American alternative rock band
• THD Electronics, a guitar amplifier manufacturer
• Tho Xuan Airport (IATA code)
• Total harmonic distortion, a measure of the distortion of an audio signal
• Total Hi Def (Total HD), an optical disc format
• Transanal hemorrhoidal dearterialization, a surgical procedure

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