# Open O

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> Source: https://en.wikipedia.org/wiki/Open_O
> Source revision: 1344219050
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{{Short description|Letter of the Latin alphabet}}
{{redirect-distinguish-text|Ɔ|the Claudian letter [Ↄ](/source/%E2%86%83), the Greek letter [Ͻ](/source/%CF%BD), the Hebrew letter [כ](/source/%D7%9B), or the Malayam vowel sign [ാ](/source/%E0%B4%BE)}}
{{Redirect|ɔ|the sound represented by /ɔ/ in the IPA|Open-mid back rounded vowel}}
{{refimprove|date=August 2017}}
{{Infobox grapheme
| name = Ɔ
| letter = Ɔ ɔ
| variations = 
| image = File:Latin letter open O.svg
| imageclass = skin-invert-image
| imagesize = 200px
| imagealt = Upper and lower case Open O
| script = [Latin script](/source/Latin_script)
| type = [Alphabet](/source/Alphabet)
| typedesc = ic and [Logographic](/source/Logogram)
| language = [Dagbani language](/source/Dagbani_language), [Ewe language](/source/Ewe_language), [Latin language](/source/Latin_language), [Lingala language](/source/Lingala_language), [Yucatec Maya language](/source/Yucatec_Maya_language)
| phonemes = {{flex list|[{{IPAlink|ɔ}}] [{{IPAlink|tsʼ}}]}}
| unicode = U+0186, U+0254
| alphanumber = 
| number = 
| fam1 = [C](/source/C) [c](/source/c)
| fam2 = 
| usageperiod = 
| children = 
| sisters = 
| equivalents = [Ꙡ](/source/%EA%99%A0)
| associates = 
| direction = Left-to-Right
}}

'''Open o''' or '''turned c''' ([majuscule](/source/majuscule): '''Ɔ''', [minuscule](/source/Lower_case): '''ɔ''') is a letter of the extended [Latin alphabet](/source/Latin_alphabet). In the [International Phonetic Alphabet](/source/International_Phonetic_Alphabet), it represents the [open-mid back rounded vowel](/source/open-mid_back_rounded_vowel). It is used in the orthographies of many [African languages](/source/African_languages) using the [African reference alphabet](/source/African_reference_alphabet).

The [Yucatec Maya language](/source/Yucatec_Maya_language) used Ɔ to transcribe the [alveolar ejective affricate](/source/alveolar_ejective_affricate) {{IPA|[t͡sʼ]}} consonant in the orthography of the Colonial period. Now ''dz'' or ''tsʼ<!-- with ʼ -->'' is preferred.<ref> {{cite web|url=http://research.famsi.org/whos_who/orthography.htm|title=Who's who in the Classic Maya world: ''Orthography used in the Who's Who''|last=Mathews <!--it isn't a typo-->|first=Peter|website=Foundation for the Advancement of Mesoamerican Studies, Inc.|publisher=Los Angeles County Museum of Art|access-date=June 19, 2024}} </ref>

==Unicode==
{{charmap
|0186|name1=Latin Capital Letter Open O
|0254|name2=Latin Small Letter Open O
}}

On the [macOS](/source/macOS) US Extended keyboard, ''ɔ'' and ''Ɔ''  can be typed with {{key press|Option|colon}} followed by {{key press|c}} or {{key press|C}}.{{fact|date=October 2021}}

==Related characters==
===Descendants and related characters in the Latin alphabet===
*Ɔ  with [diacritic](/source/diacritic)s: ɔ́ ɔ̀  ɔ̃ [ᶗ](/source/%E1%B6%97)<ref>{{Cite web|url=https://www.unicode.org/L2/L2004/04132-n2740-phonetic.pdf|title=L2/04-132 Proposal to add additional phonetic characters to the UCS|date=2004-04-19|first=Peter|last=Constable}}</ref> 
*[Uralic Phonetic Alphabet](/source/Uralic_Phonetic_Alphabet)-specific symbols related to Ɔ:<ref>{{Cite web|url=https://www.unicode.org/L2/L2002/02141-n2419-uralic-phonetic.pdf|title=L2/02-141: Uralic Phonetic Alphabet characters for the UCS|date=2002-03-20|first1=Michael|last1=Everson|authorlink1=Michael Everson|display-authors=etal}}</ref>
**{{Unichar|1D10|LATIN LETTER SMALL CAPITAL OPEN O}}
**{{Unichar|1D12|LATIN SMALL LETTER SIDEWAYS OPEN O}}
**{{Unichar|1D53|MODIFIER LETTER SMALL OPEN O}}

===Similar looking letters===
class=skin-invert-image|thumb|The first of these Claudian letters is the ''antisigma''.
Open o looks like a reversed letter 'C'. [Claudius](/source/Claudius) [introduced](/source/Claudian_letters) a Ɔ  (the ''[antisigma](/source/antisigma)'') with the intention of replacing ''bs'' and ''ps''.

thumb|400px|Definition from Aasen (1873), ''Norsk ordbog med dansk forklaring'', showing the Danish explanatory symbol {{angbr|ɔ:}}.|class=skin-invert-image
The [Scandinavian](/source/Scandinavian_languages) explanatory symbol (''forklaringstegnet'') can be typeset using the open o followed by a colon, thus: '''ɔ:'''. It is used to mean "namely", "id est", "scilicet" or similar.<ref>{{cite web
|url=http://www.typografi.org/forklaringstegn/forklaringstegn.html
|lang=no
|website=Typografi i Norge
|title=Forklaringstegnet: en savnet del av det typografiske repertoar?
|date=2006-08-02
|orig-date=last updated 2010-09-29
|url-status=live
|archive-url=https://web.archive.org/web/20201105130113/http://www.typografi.org/forklaringstegn/forklaringstegn.html
|archive-date=2020-11-05
}}</ref>

This letter is often used to refer to the [Copyleft](/source/Copyleft) official sign, which looks like an open o with a circle around it.

==See also==
* [Open E](/source/Latin_epsilon)
* [Writing systems of Africa § Latin script](/source/Writing_systems_of_Africa)
* [Omicron](/source/Omicron)
{{Latin script|Ɔ}}

==References==
{{Reflist}}

Oz
Oz
Category:Vowel letters

{{Latin-script-stub}}
{{phonetics-stub}}

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Adapted from the Wikipedia article [Open O](https://en.wikipedia.org/wiki/Open_O) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Open_O?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.