U+27D9 · Math symbol
LaTeX
\bigtop
Large Down Tack Symbol ⟙
⟙ is large down tack, U+27D9 — \bigtop in LaTeX. It was added in Unicode 3.2, and Unicode files it under Math symbol.
Codes & technical data
| Unicode | U+27D9 | |
|---|---|---|
| HTML hex | ⟙ | |
| HTML decimal | ⟙ | |
| CSS | \27D9 | |
| JavaScript | \u{27D9} | |
| Python | \U000027D9 | |
| Java / C# | \u27D9 | |
| Rust | \u{27d9} | |
| Swift | \u{27D9} | |
| PHP | \u{27D9} | |
| URL encoded | %E2%9F%99 | |
| UTF-8 bytes | E2 9F 99 | |
| UTF-16 bytes | 27D9 | |
| Base64 | 4p+Z | |
| Decimal | 10201 | |
| LaTeX | \bigtop | |
| Category | Math symbol (Sm) | |
| Introduced | Unicode 3.2 | |
Will ⟙ survive being pasted?
- Normalisation. Yes. ⟙ is unchanged by NFKC, so it survives normalising systems intact.
- Legacy encodings. ⟙ is Unicode-only — it has no Latin-1 equivalent, so a system stuck on an 8-bit encoding cannot represent it.
- Size. 3 bytes in UTF-8. Character-limited fields — SMS, bios, some form validators — usually count bytes, not characters.
Unicode cross-references
The standard points readers of ⟙ at these characters — usually because they look alike, or because one is the correct choice where the other is often used by mistake.
Other tack characters
Unicode names 14 characters ending in “tack”. They differ by direction, weight or decoration rather than by meaning.
Nearby in Miscellaneous Mathematical Symbols-A
Overflow from the main operator block — extra brackets, angle marks and logic symbols that arrived after Mathematical Operators was closed.
How to type ⟙
| Windows | Type 27D9 then press Alt+X |
|---|---|
| macOS | Press Ctrl+Cmd+Space, then search for “large down tack” |
| Linux | Press Ctrl+Shift+U, type 27d9, press Enter |
| HTML | ⟙ |
About Unicode’s Math symbol category
Unicode classifies this as a mathematical symbol, which means software that lays out formulas treats it as an operator or relation and gives it spacing accordingly, rather than setting it tight against its neighbours like a letter.
Frequently asked questions
- How do I type the ⟙ large down tack symbol?
- On Windows, type 27D9 and press Alt+X. On Linux press Ctrl+Shift+U then 27d9. On any system the quickest route is the copy button on this page.
- What is the code for ⟙?
- Large Down Tack is U+27D9 and in LaTeX as \bigtop. In UTF-8 it takes 3 bytes. The table above lists every escape format.
- What kind of character is ⟙?
- Large Down Tack is filed under Math symbol in the Miscellaneous Mathematical Symbols-A block, and was introduced in Unicode 3.2. Unicode classifies this as a mathematical symbol, which means software that lays out formulas treats it as an operator or relation and gives it spacing accordingly, rather than setting it tight against its neighbours like a letter.