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The dotted circle, in Unicode U+25CC ◌ dotted circle (HTML:
◌), is a typographic character used to illustrate the effect of a combining mark, such as a diacritic mark.
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 stand alone between regular spaces
- Diacritic ◌̂ used after a character
Using the generic dotted circle character also shows the relative positioning of the diacritic.
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