Eta (disambiguation)

Look up eta or ETA in Wiktionary, the free dictionary.

Eta (Η, η) is the seventh letter of the Greek alphabet.

Eta or ETA or eTA may also refer to:

Organisations

ETA (separatist group), Euskadi Ta Askatasuna, a Basque separatist group
Electronic Travel Authority (Australia)
Electronic Travel Authorization (Canada)
ETA – Empresa de Transporte Aéreo, a defunct Brazilian Airline
ETA SA, a Swiss watchmaking company
E-T-A, a German-based global manufacturer of circuit protection devices
ETA Systems, a defunct manufacturer of ETA10 supercomputers
Electronics Technicians Association International
Employment and Training Administration, a branch of the US Department of Labor
Engineering and Technology Academy, San Antonio, Texas, US
Environmental Transport Association, a British roadside assistance company
Ethiopian Teachers' Association
Evangelical Theological Association, a former teaching institute, Melbourne, Australia

Eta meson, in particle physics, a strongly interacting boson
Dedekind eta function, a complex function defined in the upper plane
Dirichlet eta function, an entire complex function
Eicosatetraenoic acid, an omega-3 fatty acid
Ethanolamine, a weak base
Event tree analysis, a logical modeling technique
Hapticity, η
Pseudorapidity, η, in experimental particle physics, a spatial coordinate describing the angle of a particle relative to the beam axis
Viscosity, a measure of a fluid's resistance to deformation

Eta (given name), a feminine given name
European Technical Assessment of the European Organisation for Technical Approvals for construction products
Eta (glider), a German glider
Eta, derogatory term for the Burakumin in the Japanese feudal era
'eta, a letter or glottal stop in the Tahitian languages
Eta, a snack food brand owned by Griffin's Foods
Estimated time of arrival, frequently abbreviated to ETA.