O Unicode subscripts and superscripts Octonion Fraktur Ordinal indicator Enclosed Alphanumeric Supplement Enclosed Alphanumerics Ö Õ Oʻ Ơ Ó Ǫ Ɵ Open O Mid back rounded vowel Open-mid back rounded vowel O' Ò ⱺ Ꝍ Ø Mid front rounded vowel O͘ Macron (diacritic) Dot (diacritic) Ǫ́ Breve Inverted breve Circumflex Vietnamese alphabet Hook above Double acute accent R-colored vowel Bilabial click Shift Out and Shift In characters Double grave accent Cedilla Ogonek International Phonetic Alphabet Scribal abbreviation Mid central vowel Uralic Phonetic Alphabet Nasal vowel Livonian language Ring (diacritic) Small caps Diethyl e…

ether Nasal bilabial click Caron P&O O visa O (disambiguation) O-methylated flavonoid O A e o Z O Antiphons O-GlcNAc Douglas O-38 O line Pui O O class O lucenti, o sereni occhi O series Tai O Ping-O-Tronic Big O O Come, O Come, Emmanuel O. Henry Award Big O notation Yeshe-Ö O Tannenbaum Haplogroup O-M119 Ó Paí, Ó O-ring O Tempo e o Vento Ó Rothláin O (Cyrillic)