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