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