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