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When used as a diacritic mark, the term dot is usually reserved for the ''interpunct'' ( · ), or to the glyphs "combining dot above" ( ◌̇ ) and "combining dot below" ( ◌̣ )
which may be combined with some Letter (alphabet), letters of the extended Latin alphabets in use in Central European languages and Vietnamese language, Vietnamese.

Dots

Overdot

Language scripts or transcription schemes that use the dot above a letter as a diacritical mark:

* In some forms of romanization of Arabic, Arabic romanization, stands for ''ghayin'' (غ); stands for qoph, qāf (ق).
* The Latin orthography for Chechen language, Chechen includes ċ, ç̇, ġ, q̇, and ẋ.
* In Emilian-Romagnol language, Emilian-Romagnol, ''ṅ ṡ ż'' are used to represent .
* Irish orthography#Alphabet, Traditional Irish typography, where the dot denotes lenition, and is called a or "dot of lenition": ''ḃ ċ ḋ ḟ ġ ṁ ṗ ṡ ṫ''. Alternatively, lenition may be represented by a following letter ''h'', thus: ''bh ch dh fh gh mh ph sh th''. In Old Irish orthography, the dot was used only for ''ḟ ṡ'', while the following ''h'' was used for ''ch ph th''; lenition of other letters was not indicated. Later the two systems spread to the entire set of lenitable consonants and competed with each other. Eventually the standard practice was to use the dot when writing in Insular script, Gaelic script and the following ''h'' when writing in Antiqua (typeface class), antiqua. Thus ''ċ'' and ''ch'' represent the same phonetic element in Modern Irish.
* lt, ė is pronounced as , as opposed to ''ę'', which is pronounced a lower (formerly nasal vowel, nasalised), or ''e'', pronounced .
* Livonian language, Livonian uses ȯ as one of its eight vowels.
* mt, ċ is used for a voiceless palato-alveolar affricate, ''ġ'' for a voiced palato-alveolar affricate, and ''ż'' for a Voiced alveolar fricative#Voiced alveolar sibilant, voiced alveolar sibilant.
* Middle English: ''ẏ'' was sometimes used to distinguish etymological ''y'' from the glyph's use as a replacement for ''þ'', which did not exist in early press typographies.
* Old English: In modernized orthography, ''ċ'' is used for a voiceless palato-alveolar affricate , ''ġ'' for a palatal approximant (probably a voiced palatal fricative in the earliest texts), and (more rarely) ''sċ'' for a voiceless palato-alveolar fricative and ''cġ'' for a voiced palato-alveolar affricate .
* pl, ż is used for a voiced retroflex sibilant .
* The Siouan languages, Sioux languages such as Lakota language, Lakota, Osage language, Osage, and Crow language, Crow sometimes use the dot above to indicate ejective consonant, ejective stops.
* In the Canadian Aboriginal Syllabics orthography for the Cree language, Cree, Ojibwe language, Ojibwe, and Inuktitut languages, a dot above a symbol signifies that the symbol's vowel should be a long vowel—the equivalent effect using the Roman orthography is achieved by doubling the vowel (ᒥ = mi, ᒦ = mii ), placing a Macron (diacritic), macron over the vowel (ᑲ = ka, ᑳ = kā), or placing a circumflex over the vowel (ᓄ = no, ᓅ = nô).
* In Turkish language, Turkish, the dot above lowercase ''i'' and ''j'' (and uppercase ''I-dot, İ'') is not regarded as an independent diacritic but as an integral part of the letter. It is called a tittle. Dotless I, I without an overdot is a separate letter.
* In the Rheinische Dokumenta phonetic writing system overdots denote a special pronunciation of ''r''.
* The Ulithian language, Ulithian alphabet includes ȧ, ė, and ȯ.
* The ISO 9 (1968) Romanization of Cyrillic uses ''ė'', ''ḟ'', and ''ẏ''.
* In the ISO 259 Romanization of Hebrew, the overdot is used to transcribe the dagesh: ; transcribes the shuruk.
* In IAST and National Library at Calcutta romanization transcribing languages of India, ''ṅ'' is used to represent .
* United Nations Group of Experts on Geographical Names, UNGEGN romanization of Urdu includes ṙ.
* In the Venda language, ''ṅ'' is used to represent .
* Some countries use the overdot as a decimal mark.

The overdot is also used in the Devanagari, Devanagari script, where it is called anusvara.

In mathematics and physics, when using Notation for differentiation#Newton's notation, Newton's notation the dot denotes the time derivative as in $v=\dot$. In addition, the overdot is one way used to indicate an repeating decimal, infinitely repeating set of numbers in decimal notation, as in $0.\dot$, which is equal to the fraction , and $0.\dot\dot\dot\dot\dot\dot$ or $0.\dot4285\dot$, which is equal to 142857 (number), .

Underdot

* In a number of languages, an underdot indicates a Raising (sound change), raised or Vowel#Height, relatively high vowel, often the counterpart of a lower vowel marked with an ogonek or left unmarked.
** In Rotuman language, Rotuman, "ạ" represents /ɔ/.
** In Romagnol dialect, Romagnol, ''ẹ ọ'' are used to represent [e, o], e.g. part of Riminese dialect ''fradẹll, ọcc'' "brothers, eyes".
** In academic notation of Old Latin, ''ẹ̄'' (''e'' with underdot and macron) represents the long vowel, probably , that developed from the early Old Latin diphthong ''ei''. This vowel usually became ''ī'' in Classical Latin.
** In academic transcription of Vulgar Latin, used in describing the development of the Romance languages, ẹ and ọ represent the close-mid vowels and , in contrast with the open-mid vowels and , which are represented as ''e'' and ''o'' with ogonek (ę ǫ).
** Academic transcription of Middle English uses the same conventions as Vulgar Latin above.
** In academic transcription of Serbo-Croatian dialects, ''ẹ ọ ạ'' (typically ) represent higher vowels than standard ''e o a'', and the first two often contrast with lower vowels marked with a comma below, ''e̦ o̦'' (typically ).
* In Inari Sami language, Inari Sami, an underdot denotes a half-long voiced consonant: ''đ̣, j̣, ḷ, ṃ, ṇ, ṇj, ŋ̣, ṛ'', and ''ṿ''. The underdot is used in dictionaries, textbooks, and linguistic publications only.
* In IAST and National Library at Calcutta romanization, transcribing languages of India, a dot below a letter distinguishes the retroflex consonants ''ṭ, ḍ, ṛ, ḷ, ṇ, ṣ'', while ''m'' with underdot (''ṃ'') signifies an ''anusvara'' and ''h'' with underdot (''ḥ'') signifies a ''visarga''. Very frequently (in modern transliterations of Sanskrit) an underdot is used instead of the ring (diacritic) below the vocalic ''r'' and ''l''.
* In romanizations of some Afroasiatic languages, particularly Semitic Languages and Berber Languages, an underdot indicates an emphatic consonant. The romanization of Arabic uses .
* In the DIN 31636 and ALA-LC Romanization of Hebrew, ''ṿ'' represents vav (ו), while ''v'' without the underdot represents beth (ב). ''ḳ'' represents qoph (ק)
* The underdot is also used in the PDA orthography for Domari to show pharyngealization—the underdotted consonants represent the emphaticized sounds .
*In Asturian language, Asturian, ''ḷḷ'' (underdotted double ''ll'') represents the voiced retroflex plosive or the voiceless retroflex affricate, depending on dialect, and ''ḥ'' (underdotted ''h'') the voiceless glottal fricative.
*In O'odham language, ''Ḍ'' (''d'' with underdot) represents a voiced retroflex stop.
* Vietnamese language, Vietnamese: The ''nặng'' tone (linguistics), tone (low, glottal) is represented with a dot below the base vowel: ''ạ ặ ậ ẹ ệ ị ọ ộ ợ ụ ự ỵ''.
* In Igbo language, Igbo, an underdot can be used on ''i'', ''o'', and ''u'' to make ''ị'', ''ọ'', and ''ụ''. The underdot symbolizes a reduction in the vowel height.
* In Yoruba language, Yoruba, an underdot can be used on ''e'' and ''o'' to make ''ẹ'' and ''ọ'', symbolizing a reduction in the vowel height, as well as on ''s'' to make ''ṣ'', symbolizing a postalveolar articulation.
* In Americanist phonetic notation, ''x'' with underdot ''x̣'' represents a voiceless uvular fricative.
* Underdots are used in the Rheinische Dokumenta phonetic writing system to denote a voiced ''s'' and special pronunciations of ''r'' and ''a''.
* In the Fiero-Rhodes orthography for Eastern Ojibwe language, Eastern Ojibwe and Ottawa dialect, Odaawaa, in ''g̣'', ''ḥ'', and ''ḳ'', underdot is used to indicate labialization when either or following them was lost in Syncope (phonology), syncope.
* The Sicilian language, Sicilian nexus ''ḍḍ'' is used to represent .
* In Kalabari language, Kalabari, ''ḅ'' and ''ḍ'' are used.
* In Marshallese language, Marshallese, underdots on consonants represent velarization, such as the velarized bilabial nasal ''ṃ''.
* In Old Irish typography the letters ḃ, ḋ and ṫ are some times written as ḅ, ḍ and ṭ.
* UNGEGN romanization of Urdu includes ḍ, g̣, ḳ, ṭ, ẉ, and ỵ.
* In Mizo language, Mizo, ''ṭ'' represents .
* The underdot is also used in the Devanagari script, where it is called nukta.

Raised dot

* Number digits in Enclosed Alphanumerics: '
* In Canadian Aboriginal Syllabics, in addition to the middle dot as a letter, centred dot diacritic, and dot above diacritic, there also is a two-dot diacritic in the Naskapi language representing /_w_V/ which depending on the placement on the specific Syllabic letter may resemble a colon when placed vertically, Diaeresis (diacritic), diaeresis when placed horizontally, or a combination of middle dot and dot above diacritic when placed either at an angle or enveloping a small raised letter . Additionally, in Northwestern Ojibwe language, Northwestern Ojibwe, a small raised /wi/ as /w/, the middle dot is raised farther up as either or ; there also is a raised dot Final , which represents /w/ in some Swampy Cree language, Swampy Cree and /y/ in some Northwestern Ojibwe.

Letters with dot

Encoding

In Unicode, the dot is encoded at:
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and at:
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There is also:
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Pre-composed characters:

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See also

*Anunaasika
*Chandrabindu
*Diaeresis (diacritic)
*Tittle
*Arabic alphabet
*Hebrew diacritics
*Mathematical operators and symbols in Unicode
** Therefore sign (∴ and "because sign" ∵)
** Ratio ()
** Proportionality (mathematics) (∷)

References

External links

Diacritics Project — All you need to design a font with correct accents

{{Latin script, , dot

Latin-script diacritics
Polish letters with diacritics, Diakrytyka
Vietnamese alphabets