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