Look up tdi in Wiktionary, the free dictionary.

TDI may stand for:

Medicine[link]

• Tissue doppler imaging, or doppler echocardiography, a type of cardiac imaging technique via ultrasound
• Transitional Dyspnea Index

Chemistry[link]

• Tolerable Daily Intake (used in toxicology),
• Toluene diisocyanate, an organic chemical

Entertainment[link]

• Total Drama Island, an animated reality series that started July 8, 2007
• Tangerine Dream Independent is the record label belonging to Edgar Froese of Tangerine Dream

Organizations[link]

• Technical Diving International, a technical diving organization
• Telecommunications for the Deaf, Inc., a nonprofit organization promoting telecommunications devices for the deaf
• Texas Department of Insurance
• The Dartmouth Institute for Health Policy and Clinical Practice, a subsidiary of Dartmouth College

Other[link]

• Tabbed document interface, a type of graphical user interface
• Telecom Data Intelligence, ability to extract detailed customer profiling data
• Time Delay and Integration, timing synchronization in an image sensor
• Transport Driver Interface, used by NT series Windows to abstract level 7 APIs into a common protocol for the Transport Protocol layer
• Trophic Diatom Index uses the composition of freshwater diatom assemblages to assess water quality and ecological status
• Turbocharged Direct Injection, a diesel engine used in cars and light vans made by the Volkswagen Group

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