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