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