U+01DE "Ǟ" Latin Capital Letter A with Diaeresis and Macron Unicode Character
U+01DE "Ǟ" Latin Capital Letter A with Diaeresis and Macron is a composite glyph that combines a standard Latin capital letter A with two diacritical marks: a diaeresis, consisting of two dots placed above the letter, and a macron, which is a horizontal line situated above the diaeresis. This character is used in the transcription of certain languages, such as in the romanization of Old English or in specific linguistic contexts to denote a long vowel sound that is also pronounced with a distinct quality, often indicating a phonemic distinction where the diaeresis signals a change in vowel pronunciation and the macron marks length. It appears in Unicode within the Latin Extended-B block and is typically employed in scholarly or orthographic systems rather than in everyday modern writing.
General Properties
| Code Point | U+01DE |
| Version Added | 1.1 |
| Name | Latin Capital Letter A with Diaeresis and Macron |
| Unicode 1.0 Name | Latin Capital Letter A Diaeresis Macron |
| Block | Latin Extended-B |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "Ä" U+00C4 Latin Capital Letter A with Diaeresis "̄" U+0304 Combining Macron |
Encodings
| HTML Decimal Encoding | Ǟ |
| HTML Hex Encoding | Ǟ |
| UTF-8 Encoding | 0xC7 0x9E |
| UTF-16 Encoding | 0x01DE |
| UTF-32 Encoding | 0x000001DE |
| C/C++/Java Escape | \u01de |
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 | "ǟ" U+01DF Latin Small Letter A with Diaeresis and Macron |
| Lowercase Code Point | "ǟ" U+01DF Latin Small Letter A with Diaeresis and Macron |
| Simple Case Folding | "ǟ" U+01DF Latin Small Letter A with Diaeresis and Macron |
| Case Folding | "ǟ" U+01DF Latin Small Letter A 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 | "ǟ" U+01DF Latin Small Letter A with Diaeresis and Macron |
| NFKC Simple Casefold | "ǟ" U+01DF Latin Small Letter A 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 |