Ionic (adj.)

"pertaining to Ionia or the Ionians," 1570s of music; 1580s of architecture, from Latin Ionicus, from Greek Ionikos (see Ionian). In prosody, a foot of two long syllables followed by two short. The Ionic school of philosophers (Thales, Anaxamander, etc.) studied the material world in ways that somewhat anticipated observational science. It also once was the name of an important school of Greek painting, but all of it save the name is lost. Related: Ionicize (1841).

ionic (adj.)

"pertaining to ions," 1890, from ion + -ic.

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Definitions of Ionic from WordNet
ionic (adj.)
containing or involving or occurring in the form of ions;
ionic hydrogen
ionic charge
ionic crystals
Ionic (adj.)
of or pertaining to the Ionic order of classical Greek architecture;
Ionic (adj.)
of or relating to Ionia or its inhabitants or its language;
Ionic (n.)
the dialect of Ancient Greek spoken and written in Attica and Athens and Ionia;
Synonyms: Attic / Ionic dialect / Classical Greek