Overdot

·
Dot
Diacritics in Latin & Greek accent acute( ´ ) double acute( ˝ ) grave( ` ) double grave(  ̏ ) breve( ˘ ) inverted breve(  ̑ ) caron, háček( ˇ ) cedilla( ¸ ) circumflex( ˆ ) diaeresis, umlaut( ¨ ) dot( · ) hook, hook above(   ̡   ̢  ̉ ) horn(  ̛ ) iota subscript(  ͅ  ) macron( ¯ ) ogonek, nosinė( ˛ ) perispomene(  ͂  ) ring( ˚, ˳ ) rough breathing( ῾ ) smooth breathing( ᾿ ) Marks sometimes used as diacritics apostrophe( ’ ) bar( ◌̸ ) colon( : ) comma( , ) hyphen( ˗ ) tilde( ~ ) Diacritical marks in other scripts Arabic diacritics Early Cyrillic diacritics kamora(  ҄ ) pokrytie(  ҇ ) titlo(  ҃ ) Gurmukhī diacritics Hebrew diacritics Indic diacritics anusvara( ं ং ം ) chandrabindu( ँ ఁ ) nukta( ़ ) virama( ् ് ్ ් ್ ) chandrakkala( ് ) IPA diacritics Japanese diacritics dakuten( ﾞ ) handakuten( ﾟ ) Khmer diacritics Syriac diacritics Thai diacritics Related Dotted circle◌ Punctuation marks Logic symbols
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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 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 ${\displaystyle v={\dot {x}}}$. However, today this is more commonly written with a prime or using Leibniz's notation. In addition, the overdot is one way used to indicate an infinitely repeating set of numbers in decimal notation, as in ${\displaystyle 0.{\dot {3}}}$, which is equal to the fraction  ¹⁄₃, and ${\displaystyle 0.{\dot {1}}{\dot {4}}{\dot {2}}{\dot {8}}{\dot {5}}{\dot {7}}}$ or ${\displaystyle 0.{\dot {1}}4285{\dot {7}}}$, which is equal to  ¹⁄₇.

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