U+A7D9 "ꟙ" Latin Small Letter Sigmoid S Unicode Character
Unicode Version 17.0
ꟙ
U+A7D9 "ꟙ" Latin Small Letter Sigmoid S is a rare and archaic letterform, representing a cursive variant of the lowercase Latin S that resembles a reversed or sigmoid shape, often used in historical orthographies of certain languages or in specialized transcription contexts to denote a unique phonetic value distinct from the standard s. It was added to the Unicode Standard as part of the Latin Extended-D block to support scholarly and linguistic documentation of extinct or minority scripts.
General Properties
| Code Point | U+A7D9 |
| Version Added | 14.0 |
| Name | Latin Small Letter Sigmoid S |
| Block | Latin Extended-D |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
Encodings
| HTML Decimal Encoding | ꟙ |
| HTML Hex Encoding | ꟙ |
| UTF-8 Encoding | 0xEA 0x9F 0x99 |
| UTF-16 Encoding | 0xA7D9 |
| UTF-32 Encoding | 0x0000A7D9 |
| C/C++/Java Escape | \ua7d9 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ꟙ" U+A7D8 Latin Capital Letter Sigmoid S |
| Simple Titlecase Code Point | "Ꟙ" U+A7D8 Latin Capital Letter Sigmoid S |
| Uppercase Code Point | "Ꟙ" U+A7D8 Latin Capital Letter Sigmoid S |
| Titlecase Code Point | "Ꟙ" U+A7D8 Latin Capital Letter Sigmoid S |
| 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 |