U+022B "ȫ" Latin Small Letter O with Diaeresis and Macron Unicode Character
Unicode Version 17.0
ȫ
U+022B "ȫ" Latin Small Letter O with Diaeresis and Macron is a specialized Latin letter that combines a base "o" with a diaeresis (two dots above) and a macron (a horizontal line above the diaeresis), indicating a prolonged or stressed vowel sound with a specific phonetic quality, such as a long front rounded vowel. It is primarily used in linguistic transcription systems, including the Uralic Phonetic Alphabet, and in some romanization schemes for languages like Livonian or Old Norse, where it distinguishes vowel length and rounding. This character is rarer than its uppercase counterpart "Ȫ" (U+022A) but serves similar scholarly and technical purposes within Unicode's extended Latin block for precise textual representation.
General Properties
| Code Point | U+022B |
| Version Added | 3.0 |
| Name | Latin Small Letter O with Diaeresis and Macron |
| Block | Latin Extended-B |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "ö" U+00F6 Latin Small Letter O with Diaeresis "̄" U+0304 Combining Macron |
Encodings
| HTML Decimal Encoding | ȫ |
| HTML Hex Encoding | ȫ |
| UTF-8 Encoding | 0xC8 0xAB |
| UTF-16 Encoding | 0x022B |
| UTF-32 Encoding | 0x0000022B |
| C/C++/Java Escape | \u022b |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ȫ" U+022A Latin Capital Letter O with Diaeresis and Macron |
| Simple Titlecase Code Point | "Ȫ" U+022A Latin Capital Letter O with Diaeresis and Macron |
| Uppercase Code Point | "Ȫ" U+022A Latin Capital Letter O with Diaeresis and Macron |
| Titlecase Code Point | "Ȫ" U+022A Latin Capital Letter O with Diaeresis and Macron |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| Script | Latin |
| Script Extensions | Latin |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Lower |