definition of Wikipedia
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:
In mathematics and physics, when using Newton's notation the dot denotes the time derivative as in . However, Newton's notation is no longer standard; instead this would be written with a prime or using Leibniz's notation.
In Unicode, the dot is encoded at:
There is also:
Letters using dot above sign ( ◌̇ )
Letters using dot below sign ( ◌̣ )
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