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