ι

Symbol

 * 1)  sometimes used to write the imaginary unit
 * 2)  the definite descriptor

Etymology
Derived from its majuscule counterpart Ι.

Letter

 * 1) Lower-case iota, the ninth letter of the ancient Greek alphabet. It represented the  . It is preceded by θ and followed by κ.

Derived terms
See also upsilon

Letter

 * 1) The lower case letter iota (γιώτα), the ninth letter of the modern Greek alphabet. Transliterated as I or J.