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