Ionian

• (Hellenic, Ionia, architecture): Ionia +‎ -n
• (moon of Jupiter): Io +‎ -n- +‎ -ian

• (UK) IPA^(key): /aɪˈəʊni.ən/
• (General American) IPA^(key): /aɪˈoʊni.ən/
• Rhymes: -əʊniən

Ionian (comparative more Ionian, superlative most Ionian)

1. Relating to the Hellenic people of that name.
2. Synonym of Ionic.
   1. Pertaining to Ionia, the ancient (ca 1100 BC) region including western Asia Minor and the adjacent Aegean Islands occupied by the Ionian people.
   2. (architecture) Alternative form of Ionic.
3. (astronomy, planetology) Relating to Io, one of the moons of the planet Jupiter.
   • Bagenal, Dowling & McKinnon (2007), Jupiter: The Planet, Satellites and Magnetosphere. Cambridge University Press, p. 313.

     Despite the variations in Ionian vulcanism ...

4. (astronomy) Relating to the asteroid (52) Io.
5. (music) Designating the Ionian mode or scale; the name of the major key in modal theory.

Ionian (plural Ionians)

1. A member of the Ionians, one of the races of Ancient Greece.
2. (science fiction) An inhabitant of Io, a moon of Jupiter.

Ionian

1. Ellipsis of Ionian Sea: A sea in the central and east central part of the Mediterranean.
2. (geology, paleontology) A subdivision of the Pleistocene epoch.