O
Unicode subscripts and superscripts
Enclosed Alphanumeric Supplement
Octonion
Fraktur
Ordinal indicator
Enclosed Alphanumerics
Ö
Õ
Ó
Ɵ
Ơ
Open-mid back rounded vowel
Ò
Oʻ
Open O
Inverted breve
O'
Ǫ
Circumflex
Ꝍ
Ø
Ǫ́
Mid back rounded vowel
O͘
ⱺ
Breve
Macron (diacritic)
Bilabial click
Vietnamese alphabet
Mid front rounded vowel
International Phonetic Alphabet
Double acute accent
Dot (diacritic)
Nasal vowel
Diethyl ether
Mid central vowel
Double grave accent
Cedilla
R-colored vowel
Livonian language
Ogonek
Hook above
Scribal abbreviation
Finno-Ugric transcription
Shift Out and Shift In characters
Ring (diacritic)
Nasal bilabial click
Caron
Small caps
O,O′-Diacetyldopamine
P&O
O visa
O,O′-Dipivaloyldopamine
O-methylated flavonoid
O (disambiguation)
O Antiphons
O A e o Z
O-GlcNAc
Douglas O-38
O class
O-Acetylbufotenine
O series
O line
Pui O
O lucenti, o sereni occhi
Big O
Tai O
Ping-O-Tronic
O. Henry Award
O Come, O Come, Emmanuel
Haplogroup O-M119
Big O notation
O-ring
O Tannenbaum
O-Pivalylbufotenine
Yeshe-Ö
O (Cyrillic)
Ó Paí, Ó
O Tempo e o Vento
P&O Cruises
Isoflavone-7-O-beta-glucoside 6"-O-malonyltransferase
O-type star
O-linked glycosylation
O le Ao o le Malo
P&O Princess Cruises
O-demethylpuromycin O-methyltransferase
Flavonol-3-O-beta-glucoside O-malonyltransferase
Daddy-O
Kamen Rider Den-O + Shin-O
Pig-hoo-o-o-o-ey
Ó Rothláin
O-Acetylserine
O-Bi, O-Ba: The End of Civilization
Google I/O
Cyanidin 3-O-rutinoside 5-O-glucosyltransferase
Ó Lochlainn
Ó Sé
Vitexin 2"-O-rhamnoside 7-O-methyltransferase
Protein O-GlcNAcase
Asynchronous I/O
Cyanidin-3-O-glucoside 2-O-glucuronosyltransferase
Delphinidin 3',5'-O-glucosyltransferase
Tam o' Shanter
O-type main-sequence star
Lycoming O-235
Anthocyanin 3-O-glucoside 6''-O-hydroxycinnamoyltransferase
Anti-streptolysin O
Cyrillic O variants
O (German magazine)
O tempora, o mores!
The Big O
Haplogroup O-M175
HNLMS O 20
THC-O-acetate
Memory-mapped I/O and port-mapped I/O
O Silêncio Q Precede O Esporro
Haplogroup O-M268
O scale
W/o
Jack-o'-lantern
Double-O
Yam O
O... Saya
P&O Ferries
Subdwarf O star
Shibuya O-East
Handley Page Type O
Continental O-200
Séamus Ó Fearghail
Domnall Ó Cuindlis
Douglas O-2
Te Pīhopatanga o Te Upoko o Te Ika
Te o Tsunagō/Ai o Utaō
USS O-12
O-Zone
Heme O
'O pere e 'o musso
Anthocyanin 5-O-glucoside 6'''-O-malonyltransferase
Punk-O-Rama
I/O scheduling
O-Bahn Busway
Lycoming O-290
Páidí Ó Sé
Beta-glucogallin O-galloyltransferase
Te Pīhopatanga o Te Manawa o Te Wheke
Jell-O Gallery
USS O-7
Jell-O
Five-O
Ō clan
O-aew
Beta-glucogallin—tetrakisgalloylglucose O-galloyltransferase
Steve O.
O, The Oprah Magazine
Luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase
Man o' war
The Marquise of O
Ó hUiginn
Ō-yoroi
Ádhamh Ó Cianáin
O family
Sunn O)))
Diarmaid Ó Donnchadha
Antoine Ó Raifteiri
Mícheál Ó Cléirigh
Máirtín Ó Direáin
5-O-Methylmyricetin
O 12-class submarine
Tseung Kwan O line
O with diaeresis (Cyrillic)
Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase
Channel I/O
8-hydroxyfuranocoumarin 8-O-methyltransferase
Ó Flaithbheartaigh
Lycoming O-320
Doyle O-2 Oriole
Soleil O
Triple-O
N-acetylneuraminate 7-O(or 9-O)-acetyltransferase
Five Pointe O
Big O Tires
Ō Rissei
Lycoming O-360
Cho-Den-O series
Lycoming O-435
O. O. McIntyre
USS O-6
Yi O
O schöner Mai!
O Ta-ryŏn
USS O-5
$O$
Fionntán Ó Súilleabháin
Maelbrighte Ó Hussey
Tomás Ó Fiaich
O filii et filiae
O with tilde (Cyrillic)
O-Desmethylangolensin
HNLMS O 24