ĭon Copy link Outline I. A kind of violet, Plin. 21, 11, 38, § 64 ...II. A precious stone of a violet color, ... • ĭon, ĭi, n. [ἴον]. I. A kind of violet, Plin. 21, 11, 38, § 64; plur.: ia, id. 21, 6, 14, § 27. — II. A precious stone of a violet color, Plin. 37, 10, 61, § 170.