U+022A "Ȫ" Latin Capital Letter O with Diaeresis and Macron Unicode Character
U+022A "Ȫ" Latin Capital Letter O with Diaeresis and Macron is a composite glyph used primarily in certain romanization systems and linguistic transcriptions, particularly for writing some Uralic languages such as Livonian or Estonian dialectal forms. It represents the letter O modified with two diacritical marks: a diaeresis (two dots) placed above the O, indicating that the vowel is pronounced separately or fronted, and a macron (a horizontal line) also above, which denotes that the vowel is long in duration. This precise combination allows the character to convey a specific phonetic value that neither a simple O with diaeresis nor O with macron alone would capture. The character belongs to the Latin Extended-A block of Unicode, where it serves as a necessary tool for accurate textual representation in scholarly, linguistic, and cultural contexts.
General Properties
| Code Point | U+022A |
| Version Added | 3.0 |
| Name | Latin Capital Letter O with Diaeresis and Macron |
| Block | Latin Extended-B |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "Ö" U+00D6 Latin Capital Letter O with Diaeresis "̄" U+0304 Combining Macron |
Encodings
| HTML Decimal Encoding | Ȫ |
| HTML Hex Encoding | Ȫ |
| UTF-8 Encoding | 0xC8 0xAA |
| UTF-16 Encoding | 0x022A |
| UTF-32 Encoding | 0x0000022A |
| C/C++/Java Escape | \u022a |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Uppercase | Yes |
| Simple Lowercase Code Point | "ȫ" U+022B Latin Small Letter O with Diaeresis and Macron |
| Lowercase Code Point | "ȫ" U+022B Latin Small Letter O with Diaeresis and Macron |
| Simple Case Folding | "ȫ" U+022B Latin Small Letter O with Diaeresis and Macron |
| Case Folding | "ȫ" U+022B Latin Small Letter O with Diaeresis and Macron |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "ȫ" U+022B Latin Small Letter O with Diaeresis and Macron |
| NFKC Simple Casefold | "ȫ" U+022B Latin Small Letter O with Diaeresis and Macron |
| 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 | Upper |