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