Dotted circle

In Unicode, the dotted circle (◌) is a typographic character used to illustrate the effect of a combining mark, such as a diacritic mark.[1] In Windows, it is possible to use the key combination Alt+9676 to produce the character.

◌
Dotted circle (◌)
U+25CC ◌ DOTTED CIRCLE

Illustration

A Unicode combining mark combines with a preceding character. When used as stand-alone, it would combine unintentionally with a preceding character (possibly a space):

  • Diacritic ̒ used alone between regular spaces
  • Diacritic ◌̒ used after a character

Using the generic dotted circle character also shows the relative positioning of the diacritic.

References
  1. "Chapter 17. About the Code Charts" (PDF). The Unicode Standard. Version 6.2. Unicode, Inc. 2012-09-26. p. 273. Retrieved 2015-03-28. Combining characters are shown with a dotted circle. […] the relative position of the dotted circle indicates an […] approximate location of the base character in relation to the combining mark. […]
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