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