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