U+01A0 "Ơ" Latin Capital Letter O with Horn Unicode Character
Unicode Version 17.0
Ơ
U+01A0 "Ơ" Latin Capital Letter O with Horn is a distinct letter used primarily in the Vietnamese alphabet, where it represents the vowel sound [ə] or [ɤ] with a specific tonal quality, often described as an unrounded back vowel. It is formed by adding a small horn-shaped diacritic to the top right of the Latin letter O, and it appears in words such as "cơm" meaning rice. This character is part of the extended Latin set, essential for correctly writing and rendering Vietnamese text, and it contrasts with its lowercase counterpart "ơ" at code point U+01A1.
General Properties
| Code Point | U+01A0 |
| Version Added | 1.1 |
| Name | Latin Capital Letter O with Horn |
| Unicode 1.0 Name | Latin Capital Letter O Horn |
| Block | Latin Extended-B |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "O" U+004F Latin Capital Letter O "̛" U+031B Combining Horn |
Encodings
| HTML Decimal Encoding | Ơ |
| HTML Hex Encoding | Ơ |
| UTF-8 Encoding | 0xC6 0xA0 |
| UTF-16 Encoding | 0x01A0 |
| UTF-32 Encoding | 0x000001A0 |
| C/C++/Java Escape | \u01a0 |
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 | "ơ" U+01A1 Latin Small Letter O with Horn |
| Lowercase Code Point | "ơ" U+01A1 Latin Small Letter O with Horn |
| Simple Case Folding | "ơ" U+01A1 Latin Small Letter O with Horn |
| Case Folding | "ơ" U+01A1 Latin Small Letter O with Horn |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "ơ" U+01A1 Latin Small Letter O with Horn |
| NFKC Simple Casefold | "ơ" U+01A1 Latin Small Letter O with Horn |
| 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 |