When used as a diacritic mark, the term dot refers to the glyphs "combining dot above" (◌̇), and "combining dot below" (◌̣) which may be combined with some letters of the extended Latin alphabets in use in a variety of languages.
Language scripts or transcription schemes that use the dot above a letter as a diacritical mark: In mathematics and physics, when using Newton's notation the dot denotes the time derivative as in
In addition, the overdot is one way used to indicate an infinitely repeating set of numbers in decimal notation, as in
The diacritics 〮 and 〯 , known as Bangjeom (방점; 傍點), were used to mark pitch accents in Hangul for Middle Korean.
They were written to the left of a syllable in vertical writing and above a syllable in horizontal writing.
In Unicode, the dot is encoded at: and at: There is also: Pre-composed characters: