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