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