O
Unicode subscripts and superscripts
Enclosed Alphanumeric Supplement
Octonion
Fraktur
Ordinal indicator
Enclosed Alphanumerics
Ö
Ɵ
Ơ
Oʻ
Õ
Ǫ
Ò
Ó
Open O
O'
Open-mid back rounded vowel
Inverted breve
Mid back rounded vowel
ⱺ
Breve
Ꝍ
Ǫ́
Mid front rounded vowel
O͘
Ø
Circumflex
Macron (diacritic)
Bilabial click
Double acute accent
Dot (diacritic)
Vietnamese alphabet
International Phonetic Alphabet
Cedilla
Nasal vowel
Mid central vowel
Double grave accent
R-colored vowel
Hook above
Diethyl ether
Livonian language
Ogonek
Shift Out and Shift In characters
Finno-Ugric transcription
Scribal abbreviation
Ring (diacritic)
Small caps
Nasal bilabial click
Caron
O,O′-Diacetyldopamine
P&O
O,O′-Dipivaloyldopamine
O visa
O-methylated flavonoid
O (disambiguation)
O-GlcNAc
O Antiphons
O A e o Z
Douglas O-38
O-Acetylbufotenine
Pui O
O class
O line
O lucenti, o sereni occhi
Tai O
O series
Ping-O-Tronic
O. Henry Award
O Come, O Come, Emmanuel
Big O
Big O notation
O (Cyrillic)
O-ring
O-Pivalylbufotenine
Haplogroup O-M119
Yeshe-Ö
O Tannenbaum
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
Ó Rothláin
O-demethylpuromycin O-methyltransferase
O-linked glycosylation
Flavonol-3-O-beta-glucoside O-malonyltransferase
Pig-hoo-o-o-o-ey
Daddy-O
Kamen Rider Den-O + Shin-O
O-Acetylserine
O-Bi, O-Ba: The End of Civilization
Protein O-GlcNAcase
O-type main-sequence star
Ó Lochlainn
Vitexin 2"-O-rhamnoside 7-O-methyltransferase
Asynchronous I/O
Ó Sé
Google I/O
Cyanidin 3-O-rutinoside 5-O-glucosyltransferase
Delphinidin 3',5'-O-glucosyltransferase
Lycoming O-235
Tam o' Shanter
Cyanidin-3-O-glucoside 2-O-glucuronosyltransferase
Anthocyanin 3-O-glucoside 6''-O-hydroxycinnamoyltransferase
Anti-streptolysin O
Jell-O
O scale
Memory-mapped I/O and port-mapped I/O
Haplogroup O-M175
Cyrillic O variants
HNLMS O 20
O Silêncio Q Precede O Esporro
The Big O
THC-O-acetate
Haplogroup O-M268
W/o
O (German magazine)
Handley Page Type O
Double-O
Shibuya O-East
Subdwarf O star
Jack-o'-lantern
Te Pīhopatanga o Te Upoko o Te Ika
O... Saya
O tempora, o mores!
Yam O
P&O Ferries
Te o Tsunagō/Ai o Utaō
USS O-12
Continental O-200
Séamus Ó Fearghail
Te Pīhopatanga o Te Manawa o Te Wheke
'O pere e 'o musso
O-Zone
Lycoming O-290
Domnall Ó Cuindlis
USS O-7
I/O scheduling
Punk-O-Rama
Heme O
Anthocyanin 5-O-glucoside 6'''-O-malonyltransferase
Páidí Ó Sé
Jell-O Gallery
Ō clan
O-Bahn Busway
O-aew
Beta-glucogallin O-galloyltransferase
Five-O
Beta-glucogallin—tetrakisgalloylglucose O-galloyltransferase
Luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase
Ō-yoroi
Ó hUiginn
Steve O.
Man o' war
Douglas O-2
O, The Oprah Magazine
Ádhamh Ó Cianáin
O family
Mícheál Ó Cléirigh
The Marquise of O
Diarmaid Ó Donnchadha
Antoine Ó Raifteiri
Tseung Kwan O line
Channel I/O
5-O-Methylmyricetin
Lycoming O-360
8-hydroxyfuranocoumarin 8-O-methyltransferase
O 12-class submarine
Máirtín Ó Direáin
Sunn O)))
Doyle O-2 Oriole
Ō Rissei
Soleil O
Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase
Triple-O
Big O Tires
Lycoming O-320
Cho-Den-O series
Laugh-O-Gram Studio
O schöner Mai!
Lycoming O-435
N-acetylneuraminate 7-O(or 9-O)-acetyltransferase
HNLMS O 24
O with tilde (Cyrillic)
Yi O
Tomás Ó Fiaich
USS O-5
O Ta-ryŏn
O with macron (Cyrillic)
Five Pointe O
O. O. McIntyre
Bit-O-Honey
USS O-6
Cruise-O-Matic
Maelbrighte Ó Hussey
Ó Flaithbheartaigh
O-Desmethylangolensin