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 letters of the extended Latin alphabets in use in Central European languages and Vietnamese.
Language scripts or transcription schemes that use the dot above a letter as a diacritical mark:
The overdot is also used in the Devanagari script, where it is called anusvara.
In mathematics and physics, when using Newton's notation the dot denotes the time derivative as in Failed to parse (Missing texvc executable; please see math/README to configure.): v=\dot{x} . However, Newton's notation is no longer standard; instead this would be written with a prime or using Leibniz's notation.
The underdot is also used in the Devanagari script, where it is called nukta.
In Unicode, the dot is encoded at:
and at:
There is also:
The Overdot diacritic (Unicode combining diacritic "combining dot above" U+0307 ̇ ).
Precomposed characters: Ȧ, Ḃ, Ċ, Ḋ, Ė, Ḟ, Ġ, Ḣ, İ, Ṁ, Ṅ, Ȯ, Ṗ, Ṙ, Ṡ, Ṫ, Ẇ, Ẋ, Ẏ, Ż.