Other crossword clues for answer "OMICRON"OMICRONXi followerGreek letterPi precederGreek for "little O"Greek vowelFrat letterHoi polloi characterXi-pi go-betweenO in Greek.Fifteenth letter of Greek alphabet.First letter given to OdysseusBetween xi and piFraternity letterCircular Greek letterCertain fraternity chapterA fraternity chapterOOriginal opening to Homer's "Odyssey"?Head of Olympus?Ovoid letter15th letter of the Greek alphabetO or OLetter between xi and pi