O
Unicode subscripts and superscripts
Ordinal indicator
Octonion
Fraktur
Enclosed Alphanumeric Supplement
Enclosed Alphanumerics
Ɵ
Ö
Ơ
Ó
Open O
O'
Õ
Ò
Ǫ
Breve
Oʻ
Mid back rounded vowel
Ø
Inverted breve
Open-mid back rounded vowel
Ꝍ
O͘
Ǫ́
Mid front rounded vowel
ⱺ
Double acute accent
Circumflex
Dot (diacritic)
Vietnamese alphabet
Bilabial click
Cedilla
Macron (diacritic)
Hook above
Ogonek
Nasal vowel
Shift Out and Shift In characters
Double grave accent
International Phonetic Alphabet
Finno-Ugric transcription
Mid central vowel
Livonian language
Scribal abbreviation
R-colored vowel
Diethyl ether
Ring (diacritic)
Small caps
Nasal bilabial click
Caron
O,O′-Diacetyldopamine
P&O
O,O′-Dipivaloyldopamine
O visa
O (disambiguation)
O-methylated flavonoid
O A e o Z
O-GlcNAc
O Antiphons
Douglas O-38
O-Acetylbufotenine
O class
Pui O
O lucenti, o sereni occhi
O line
O series
Tai O
Ping-O-Tronic
O Come, O Come, Emmanuel
Big O
O (Cyrillic)
Big O notation
O. Henry Award
O-Pivalylbufotenine
O-ring
Haplogroup O-M119
O Tannenbaum
Yeshe-Ö
Ó Paí, Ó
O Tempo e o Vento
Isoflavone-7-O-beta-glucoside 6"-O-malonyltransferase
P&O Cruises
O-type star
O-linked glycosylation
P&O Princess Cruises
O-demethylpuromycin O-methyltransferase
O le Ao o le Malo
Flavonol-3-O-beta-glucoside O-malonyltransferase
Daddy-O
Kamen Rider Den-O + Shin-O
Pig-hoo-o-o-o-ey
O-Acetylserine
O-Bi, O-Ba: The End of Civilization
Ó Rothláin
Ó Lochlainn
Ó Sé
Vitexin 2"-O-rhamnoside 7-O-methyltransferase
O-type main-sequence star
Protein O-GlcNAcase
Google I/O
Cyanidin 3-O-rutinoside 5-O-glucosyltransferase
Asynchronous I/O
Lycoming O-235
Delphinidin 3',5'-O-glucosyltransferase
Tam o' Shanter
O tempora, o mores!
Cyrillic O variants
Cyanidin-3-O-glucoside 2-O-glucuronosyltransferase
The Big O
Anti-streptolysin O
Memory-mapped I/O and port-mapped I/O
Anthocyanin 3-O-glucoside 6''-O-hydroxycinnamoyltransferase
THC-O-acetate
Haplogroup O-M175
O scale
Haplogroup O-M268
HNLMS O 20
Jell-O
O Silêncio Q Precede O Esporro
O (German magazine)
Double-O
Jack-o'-lantern
Subdwarf O star
W/o
Shibuya O-East
O... Saya
Handley Page Type O
Yam O
Séamus Ó Fearghail
Te Pīhopatanga o Te Upoko o Te Ika
Te o Tsunagō/Ai o Utaō
Domnall Ó Cuindlis
P&O Ferries
O-Zone
Punk-O-Rama
Lycoming O-290
Continental O-200
Heme O
O-Bahn Busway
Douglas O-2
USS O-12
'O pere e 'o musso
I/O scheduling
USS O-7
Jell-O Gallery
Beta-glucogallin O-galloyltransferase
Te Pīhopatanga o Te Manawa o Te Wheke
Anthocyanin 5-O-glucoside 6'''-O-malonyltransferase
Five-O
O-aew
Steve O.
Páidí Ó Sé
Beta-glucogallin—tetrakisgalloylglucose O-galloyltransferase
Ádhamh Ó Cianáin
Man o' war
Ō clan
The Marquise of O
Sunn O)))
Ō-yoroi
Luteolin-7-O-diglucuronide 4'-O-glucuronosyltransferase
Ó hUiginn
O family
Antoine Ó Raifteiri
O, The Oprah Magazine
Diarmaid Ó Donnchadha
Mícheál Ó Cléirigh
8-hydroxyfuranocoumarin 8-O-methyltransferase
5-O-Methylmyricetin
Channel I/O
O 12-class submarine
Flavanone 7-O-glucoside 2"-O-beta-L-rhamnosyltransferase
Lycoming O-320
Máirtín Ó Direáin
Tseung Kwan O line
Ō Rissei
Triple-O
Big O Tires
Doyle O-2 Oriole
Ó Flaithbheartaigh
Soleil O
O. O. McIntyre
Lycoming O-435
Cho-Den-O series
O schöner Mai!
Lycoming O-360
N-acetylneuraminate 7-O(or 9-O)-acetyltransferase
Five Pointe O
O Ta-ryŏn
Yi O
O with tilde (Cyrillic)
Tomás Ó Fiaich
Maelbrighte Ó Hussey
O filii et filiae
HNLMS O 24
Cruise-O-Matic
USS O-5
USS O-6
O-Desmethylangolensin
Bit-O-Honey
O salutaris hostia