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