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