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

click Caron Small caps O,O′-Diacetyldopamine P&O O,O′-Dipivaloyldopamine O (disambiguation) O-methylated flavonoid O visa O A e o Z O Antiphons O-GlcNAc Douglas O-38 O class O-Acetylbufotenine Pui O O line O series Big O O lucenti, o sereni occhi O. Henry Award Big O notation O Come, O Come, Emmanuel Ping-O-Tronic Tai O O-Pivalylbufotenine O-ring Haplogroup O-M119 O Tannenbaum Yeshe-Ö Ó Paí, Ó O Tempo e o Vento Ó Rothláin P&O Cruises P&O Princess Cruises O-type star O (Cyrillic) O le Ao o le Malo O-linked glycosyl

ation Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase Soleil O Ó Flaithbheartaigh Antoine Ó Raifteiri O. O. McIntyre 8-hydroxyfuranocoumarin 8-O-methyltransferase Ō Rissei Doyle O-2 Oriole Lycoming O-320 Five Pointe O O with tilde (Cyrillic) Triple-O USS O-6 Cho-Den-O series O schöner Mai! Laugh-O-Gram Studio Lycoming O-435 N-acetylneuraminate 7-O(or 9-O)-acetyltransferase O Ta-ryŏn HNLMS O 24 Lycoming O-360 O-Desmethylangolensin Yi O O gaúcho Big O Tires Cruise-O-Matic $O$ USS O-5 O with macron (Cyrillic)