1. ei - Noun
2. ei - Symbol
(Canada) Initialism of employment insurance.
Initialism of extreme ironing.
Initialism of enhanced interrogation.
Initialism of enemy infantry.
Initialism of Encyclopædia Iranica.
ei
(lexicography, dated) An orthographic ⟨i⟩ with a diacritic that marks it as being the PRICE vowel, as in the word "fine".