Ξξ ⟵ {\displaystyle \longleftarrow } 15 ⟶ {\displaystyle \longrightarrow } Ππ Pronunciation IPA (key): /ˈɑm.ɪ.ˌkrɑn/ or /ˈoʊ.mɪ.ˌkrɒn/ or /ˈɔmɪkrən/ Audio (US)(file) Audio (US)(file) Noun Singular omicron Plural omicrons Fifteenth letter of Greek. Οο. The Simple English Wikipedia has an article on: Omicron Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads