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The colon alphabetic letter is used in a number of languages and phonetic transcription systems, generally for
vowel length In linguistics, vowel length is the perceived length of a vowel sound: the corresponding physical measurement is duration. In some languages vowel length is an important phonemic factor, meaning vowel length can change the meaning of the word ...
or tone. It resembles but differs from the colon punctuation mark, . In some fonts, the two dots are placed a bit closer together than those of the punctuation colon so that the two characters are visually distinct. In
Unicode Unicode, formally The Unicode Standard,The formal version reference is is an information technology standard for the consistent encoding, representation, and handling of text expressed in most of the world's writing systems. The standard, ...
it has been assigned the code , which behaves like a letter rather than a punctuation mark in electronic texts. In practice, however, an
ASCII ASCII ( ), abbreviated from American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices. Because ...
colon is frequently used for the letter. In
Windows Windows is a group of several proprietary graphical operating system families developed and marketed by Microsoft. Each family caters to a certain sector of the computing industry. For example, Windows NT for consumers, Windows Server for se ...
and
macOS macOS (; previously OS X and originally Mac OS X) is a Unix operating system developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Mac computers. Within the market of desktop and la ...
, the letter colon can be used to emulate the punctuation colon in file names, where the punctuation colon is a reserved character that cannot be used.


Alphabetic letter

Several of the
Native American languages Over a thousand indigenous languages are spoken by the Indigenous peoples of the Americas. These languages cannot all be demonstrated to be related to each other and are classified into a hundred or so language families (including a large numbe ...
of North America use the colon to indicate vowel length. Zuni is one. Other languages include
Hupa Hupa ( Yurok language term: Huep'oola' / Huep'oolaa = "Hupa people") are a Native American people of the Athabaskan-speaking ethnolinguistic group in northwestern California. Their endonym is Natinixwe, also spelled Natinook-wa, meaning "Peopl ...
of California, Oʼodham of Arizona,
Sayula Popoluca Sayula Popoluca, also called Sayultec, is a Mixe language spoken by around 5,000 indigenous people in and around the town of Sayula de Alemán in the southern part of the state of Veracruz, Mexico. Almost all published research on the language h ...
of Mexico and
Mohawk Mohawk may refer to: Related to Native Americans * Mohawk people, an indigenous people of North America (Canada and New York) *Mohawk language, the language spoken by the Mohawk people * Mohawk hairstyle, from a hairstyle once thought to have been ...
of Ontario. Still others use a half colon (just the top dot of the colon, or a
middot An interpunct , also known as an interpoint, middle dot, middot and centered dot or centred dot, is a punctuation mark consisting of a vertically centered dot used for interword separation in ancient Latin script. (Word-separating spaces did n ...
, ). Both conventions derive from Americanist phonetic notation (below). The colon is used as a grammatical tone letter in Budu in the
Democratic Republic of the Congo The Democratic Republic of the Congo (french: République démocratique du Congo (RDC), colloquially "La RDC" ), informally Congo-Kinshasa, DR Congo, the DRC, the DROC, or the Congo, and formerly and also colloquially Zaire, is a country in ...
, in Sabaot in
Kenya ) , national_anthem = " Ee Mungu Nguvu Yetu"() , image_map = , map_caption = , image_map2 = , capital = Nairobi , coordinates = , largest_city = Nairobi , ...
, in some Grebo in
Liberia Liberia (), officially the Republic of Liberia, is a country on the West African coast. It is bordered by Sierra Leone to Liberia–Sierra Leone border, its northwest, Guinea to Guinea–Liberia border, its north, Ivory Coast to Ivory Coast� ...
, and in several languages of
Papua New Guinea Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papua Niugini; ho, Independen Stet bilong Papua Niu Gini), is a country i ...
:
Erima Erima is a suburb of Port Moresby, the capital city of Papua New Guinea Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong ...
, Gizra, Go꞉bosi, Gwahatike,
Kaluli The Kaluli are a clan of illiterate how to talk" begins, and thus talk begins to be directed directly at the child. This does not exist in middle-class Anglo cultures, where infants are addressed somewhat like intentioned competent individuals f ...
,
Kamula Kamula (Kamira, Wawoi) is a Trans–New Guinea language that is unclassified within that family in the classification of Malcolm Ross (2005). Noting insufficient evidence, Pawley and Hammarström (2018) leave it as unclassified. Demographics ...
, Kasua,
Kuni-Boazi Boazi (Bwadji), also known as Kuni after one of its dialects, is a Papuan language spoken in the Western Province of Papua New Guinea Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Inde ...
and
Zimakani Zimakani is a Papuan language spoken in Papua New Guinea Papua New Guinea (abbreviated PNG; , ; tpi, Papua Niugini; ho, Papua Niu Gini), officially the Independent State of Papua New Guinea ( tpi, Independen Stet bilong Papua Niugini; ...
.


Phonetic symbol

In
Americanist phonetic notation Americanist phonetic notation, also known as the North American Phonetic Alphabet (NAPA), the Americanist Phonetic Alphabet or the American Phonetic Alphabet (APA), is a system of phonetic notation originally developed by European and American ...
, a colon may be used to indicate vowel length. This convention is somewhat less common than the half-colon. In the
International Phonetic Alphabet The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standardized representation ...
, a special triangular colon-like letter is used to indicate that the preceding
consonant In articulatory phonetics, a consonant is a speech sound that is articulated with complete or partial closure of the vocal tract. Examples are and pronounced with the lips; and pronounced with the front of the tongue; and pronounced w ...
or vowel is long. Its form is that of two triangles pointing toward each other rather than the two dots of Americanist notation. It is available in Unicode as . If the upper triangle is used without the lower one (), it designates a
half-long In phonetics, length or quantity is a feature of sounds that have distinctively extended duration compared with other sounds. There are long vowels as well as long consonants (the latter are often called ''geminates''). Many languages do no ...
vowel or consonant. The
Uralic Phonetic Alphabet The Uralic Phonetic Alphabet (UPA) or Finno-Ugric transcription system is a phonetic transcription or notational system used predominantly for the transcription and reconstruction of Uralic languages. It was first published in 1901 by Eemil Nes ...
uses .


References

Latin-script letters {{Writingsystem-stub