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