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