U+2ADF "⫟" Short down Tack Unicode Character
Unicode Version 17.0
⫟
U+2ADF "⫟" Short down Tack is a mathematical symbol belonging to the Supplemental Mathematical Operators block, designed to represent a downward pointing tack or a reversal of the standard up tack (⊥). It is used in formal logic, lattice theory, and order theory to denote relations such as "not less than" or to indicate a specific binary operation or orthogonal complement in non standard notation. Unlike its more common counterpart the up tack, which often signifies falsity or orthogonality, the short down tack flips this meaning orientation, making it a precise tool for expressing reversed logical or structural relationships in academic and technical contexts.
General Properties
| Code Point | U+2ADF |
| Version Added | 3.2 |
| Name | Short down Tack |
| Block | Supplemental Mathematical Operators |
| General Category | Math Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ⫟ |
| HTML Hex Encoding | ⫟ |
| UTF-8 Encoding | 0xE2 0xAB 0x9F |
| UTF-16 Encoding | 0x2ADF |
| UTF-32 Encoding | 0x00002ADF |
| C/C++/Java Escape | \u2adf |
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 |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Math | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |