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