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