U+24C4, Ⓞ
CIRCLED LATIN CAPITAL LETTER O

[U+24C3]
Enclosed Alphanumerics
[U+24C5]
Circled , a competing transcription convention for an unidentified obstruent.

Translingual

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Symbol

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  1. (phonetics) an unidentifiable/indeterminate obstruent
  2. (phonetics) unidentifiable/indeterminate back vowel
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See and ◌⃝ for uses of a letter inside a circle.