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