Merriam-Webster Collegiate Dictionary - ionic

 adjective  Etymology: International Scientific Vocabulary  Date: 1890  1. of, relating to, existing as, or characterized by ions ~ gases the ~ charge  2. based on or functioning by means of ions ~ conduction  • ~ity noun IONIC  I. adjective  Etymology: Latin & Middle French; Middle French ionique, from Latin ionicus, from Greek ionikos, from Ionia Ionia  Date: 1585  1. of or relating to the ancient Greek architectural order distinguished especially by fluted columns on bases and scroll volutes in its capitals — see order illustration  2. of or relating to Ionia or the Ionians  II. noun  Date: 1668 a dialect of ancient Greek spoken especially in Ionia and the Cyclades