ETD
# ETD

ETD may refer to:

## Science and technology

* Eustachian tube dysfunction, a disorder of the middle ear
* Everhart–Thornley detector
* Explosives trace detector or explosive trace detection
* Eye-tracking device, an experiment on the International Space Station
* Electron-transfer dissociation
* End-of-train device

## Businesses and organizations

* Club of Four (French: Société Européenne de Travaux et de Développement), an alliance of French truck manufacturers
* Estuary Transit District, an American transit operator
* ICAO designator for Etihad Airways, an Emirati airline
* Exoplanet Transit Database, a database of exoplanet transit observations
* Etadunna Airstrip, IATA airport code "ETD"

## Other uses

* Electronic Theses and Dissertations, a term used by librarians for a class of institutional repository item
* Estimated time of departure
* Exchange-traded derivative contract, a financial instrument
* Spyro: Enter the Dragonfly, a 2002 platform video game
