Everipedia Logo
Everipedia is now IQ.wiki - Join the IQ Brainlist and our Discord for early access to editing on the new platform and to participate in the beta testing.


*Not to be confused withŐ, O with double acute.*

"Õ", or "õ" is a composition of the Latin letter O with the diacritic mark tilde.

The HTML entity is Õ for Õ and õ for õ.


In Emilian-Romagnol, õ is used to represent [õː], e.g. savõ [saˈvõː] "soap".


In Estonian, Õ is the 27th letter of the alphabet (between W and Ä), and it represents a vowel characteristic of Estonian, the unrounded back vowel /ɤ/, which may be close-mid back, close back, or close-mid central.[1] The vowel was previously written with the letter Ö, but in the early 19th century, Otto Wilhelm Masing adopted the letter Õ, ending the confusion between several homographs and clearly showing how to pronounce a word.

In informal writing, e.g., emails, instant messaging and when using foreign keyboard layouts where the letter Õ is not available, some Estonians use the characters O or 6 to approximate this letter.

In most of Saaremaa Island, Õ is pronounced the same as Ö.


In Samogitian the letter Õ represents, as in Estonian, the unrounded back vowel /ɤ/ which is unique to Samogitian and is not found in Standard Lithuanian, this is a rather new innovation brought on by the ensuing efforts of standardising Samogitian, this letter alleviates the confusion between the 2 distinct pronunciations of the letter ė.


In the Portuguese language, the symbol Õ stands for a nasal close-mid back rounded vowel, also written [õ] in IPA. It is not considered an independent letter of the alphabet: the tilde is the standard diacritic for nasalization.


In the Vietnamese language, the symbol Õ stands for the sound [ɔ] with creaky voice (rising tone with a glottal break followed by a continuation of the rising tone). Vietnamese also has derived letters / and /.


In the Võro language, this letter is the 25th letter of the alphabet, pronounced as in Estonian.[2]

Skolt Sami

In the Skolt Sami language, this letter is the 25th letter of the alphabet, pronounced like in Estonian.

Mathematical use

The symbol, pronouncedsoft-O, is used as a variant ofbig O notationthat ignores logarithmic factors. Thus,is shorthand for.

Computer encoding

Due to character encoding confusion, the letters can be seen on many incorrectly coded Hungarian web pages, representing Ő/ő (letter O with double acute accent). This can happen due to said characters sharing a code point in the ISO 8859-1 and 8859-2 character sets, as well as the Windows-1252 and Windows-1250 character sets, and the web site designer forgetting to set the correct code page. Õ is not part of the Hungarian alphabet. The usage of Unicode avoids this type of problems. In Latex the option of using "~o" and "~O" exists.

UTF-8195 149C3 95195 181C3 B5
Numeric character referenceÕÕõõ
Named character referenceÕõ
EBCDIC family239EF207CF
ISO 8859-1/4/9/10/13/14/15/16213D5245F5


Citation Linkopenlibrary.orgAsu, Eva Liina; Teras, Pire (2009), "Estonian", Journal of the International Phonetic Association, 39 (3): 367–372, doi:10.1017/s002510030999017x:369)
Oct 1, 2019, 6:45 PM
Citation Linkwww.omniglot.comOmniglot
Oct 1, 2019, 6:45 PM
Citation Linkdoi.org10.1017/s002510030999017x
Oct 1, 2019, 6:45 PM
Citation Linkwww.omniglot.comOmniglot
Oct 1, 2019, 6:45 PM
Citation Linken.wikipedia.orgThe original version of this page is from Wikipedia, you can edit the page right here on Everipedia.Text is available under the Creative Commons Attribution-ShareAlike License.Additional terms may apply.See everipedia.org/everipedia-termsfor further details.Images/media credited individually (click the icon for details).
Oct 1, 2019, 6:45 PM