O
Unicode subscripts and superscripts
Enclosed Alphanumeric Supplement
Octonion
Fraktur
Ordinal indicator
Enclosed Alphanumerics
Ö
Ǫ
Oʻ
Ɵ
Mid back rounded vowel
Õ
Ó
Ò
Ơ
ⱺ
Open-mid back rounded vowel
Mid front rounded vowel
O͘
Open O
O'
Ø
Ꝍ
Breve
Ǫ́
Bilabial click
Macron (diacritic)
Vietnamese alphabet
Nasal vowel
Double grave accent
Inverted breve
Double acute accent
Dot (diacritic)
Ogonek
Circumflex
Mid central vowel
Livonian language
R-colored vowel
Finno-Ugric transcription
Cedilla
Hook above
Scribal abbreviation
Shift Out and Shift In characters
Ring (diacritic)
International Phonetic Alphabet
Nasal bilabial click
Caron
Diethyl ether
Small caps
O,O′-Diacetyldopamine
P&O
O,O′-Dipivaloyldopamine
O visa
O-methylated flavonoid
O (disambiguation)
O Antiphons
O-GlcNAc
O A e o Z
Douglas O-38
O-Acetylbufotenine
O class
O line
Pui O
O series
O lucenti, o sereni occhi
Tai O
Big O
Big O notation
O Come, O Come, Emmanuel
O. Henry Award
Ping-O-Tronic
O-Pivalylbufotenine
Haplogroup O-M119
O-ring
Yeshe-Ö
O Tannenbaum
O (Cyrillic)
Ó Paí, Ó
O Tempo e o Vento
O le Ao o le Malo
P&O Cruises
O-type star
Isoflavone-7-O-beta-glucoside 6"-O-malonyltransferase
P&O Princess Cruises
O-linked glycosylation
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-Bi, O-Ba: The End of Civilization
Google I/O
O-Acetylserine
Asynchronous I/O
Ó Lochlainn
Cyanidin 3-O-rutinoside 5-O-glucosyltransferase
Vitexin 2"-O-rhamnoside 7-O-methyltransferase
Protein O-GlcNAcase
Lycoming O-235
Ó Sé
Cyanidin-3-O-glucoside 2-O-glucuronosyltransferase
O-type main-sequence star
Delphinidin 3',5'-O-glucosyltransferase
Memory-mapped I/O and port-mapped I/O
Tam o' Shanter
Anti-streptolysin O
O scale
Anthocyanin 3-O-glucoside 6''-O-hydroxycinnamoyltransferase
O (German magazine)
HNLMS O 20
Cyrillic O variants
Haplogroup O-M268
Subdwarf O star
Haplogroup O-M175
Jack-o'-lantern
P&O Ferries
Handley Page Type O
O Silêncio Q Precede O Esporro
THC-O-acetate
The Big O
USS O-12
O... Saya
Continental O-200
W/o
Shibuya O-East
Te Pīhopatanga o Te Upoko o Te Ika
Double-O
Yam O
Te o Tsunagō/Ai o Utaō
Lycoming O-290
O tempora, o mores!
O-Zone
Domnall Ó Cuindlis
I/O scheduling
Séamus Ó Fearghail
Heme O
USS O-7
Anthocyanin 5-O-glucoside 6'''-O-malonyltransferase
Páidí Ó Sé
'O pere e 'o musso
Beta-glucogallin O-galloyltransferase
Te Pīhopatanga o Te Manawa o Te Wheke
Beta-glucogallin—tetrakisgalloylglucose O-galloyltransferase
Punk-O-Rama
O, The Oprah Magazine
Douglas O-2
Jell-O Gallery
O-Bahn Busway
Luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase
O-aew
Ó hUiginn
Five-O
Ō clan
The Marquise of O
Ádhamh Ó Cianáin
Ō-yoroi
Steve O.
Man o' war
Diarmaid Ó Donnchadha
Mícheál Ó Cléirigh
Máirtín Ó Direáin
Channel I/O
O family
Jell-O
Antoine Ó Raifteiri
8-hydroxyfuranocoumarin 8-O-methyltransferase
Soleil O
Tseung Kwan O line
5-O-Methylmyricetin
Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase
Doyle O-2 Oriole
Lycoming O-360
O 12-class submarine
Ō Rissei
Sunn O)))
Lycoming O-435
Five Pointe O
Triple-O
Lycoming O-320
O schöner Mai!
N-acetylneuraminate 7-O(or 9-O)-acetyltransferase
USS O-6
Ó Flaithbheartaigh
Big O Tires
Tomás Ó Fiaich
Cruise-O-Matic
Cho-Den-O series
HNLMS O 24
O Ta-ryŏn
O with tilde (Cyrillic)
Yi O
Fionntán Ó Súilleabháin
USS O-5
O salutaris hostia
T and O map
Luteolin-7-O-glucuronide 2"-O-glucuronosyltransferase
5-hydroxyfuranocoumarin 5-O-methyltransferase
O-Desmethylangolensin