Down Tack Symbol
The ⊤ symbol, also known as the down tack, is a compact mark used in math and technical notation.
U+22A4
The ⊤ symbol is named the down tack (Unicode U+22A4). It can be copied directly or typed using common escape formats in code. Below you’ll find practical meanings, uses, and ready-to-paste examples.
Down Tack Symbol Meaning
⊤ (down tack) is a Unicode math symbol (U+22A4). In mathematical typography and technical documents, it’s often used as a visual marker connected to “tacking” or indicating a special point in notation. Depending on the context and the font, it can also be referenced as a top-like or anchoring symbol in structured expressions, where authors need a distinct, compact glyph. When you use it in documents or UI, it’s best to pair it with surrounding notation so readers can understand the intended role. If you’re unsure, test it with the same font you plan to publish with and verify it renders correctly.
Common uses
- •Math and logic notation as a standalone marker or part of a formula
- •Labeling special states or endpoints in technical diagrams and schematics
- •Creating consistent icon-like glyphs in documents and slide decks
- •Representing a “top” or “anchor” reference point in structured text layouts
- •Using it in plain-text templates where a small math symbol is needed
Examples
⊤ Down tack symbol (U+22A4)
- ⊤Set A ⊤ Set B
- ⊤Result ⊤ after simplification
- ⊤Checkpoint ⊤: ready
- ⊤Limit value ⊤ denotes the upper reference
- ⊤Use ⊤ to mark the selected node
Variations
Ready to copy
Technical codes
| Unicode | U+22A4 | |
| HTML Entity | ⊤ | |
| HTML Code | ⊤ | |
| CSS | \22A4 | |
| Alt Code | Alt + 8868 | |
| Decimal | 8868 |
How to type Down Tack Symbol (⊤)
On Windows
Hold Alt and type 8868 on the numeric keypad. In Word, type 22A4 then press Alt + X.
On Mac
Switch to the Unicode Hex Input keyboard, then hold Option and type 22A4. Or press Control + Command + Space and search.
On Linux
Press Control + Shift + U, type 22a4, then press Enter or Space.
Anywhere
Copy ⊤ with the button above and paste it wherever you need it — this works on every device and in every app, with no keyboard shortcut to remember.
FAQ
What does the Down Tack symbol mean?
⊤ (down tack) is a Unicode math symbol (U+22A4). In mathematical typography and technical documents, it’s often used as a visual marker connected to “tacking” or indicating a special point in notation. Depending on the context and the font, it can also be referenced as a top-like or anchoring symbol in structured expressions, where authors need a distinct, compact glyph. When you use it in documents or UI, it’s best to pair it with surrounding notation so readers can understand the intended role. If you’re unsure, test it with the same font you plan to publish with and verify it renders correctly.
What is the Unicode code point for ⊤?
The down tack symbol ⊤ has Unicode code point U+22A4.
How can I copy ⊤ into HTML?
Use the HTML entity: ⊤.
How do I type ⊤ in CSS?
You can use the CSS escape: \\22A4.
How do I type ⊤ in JavaScript?
Use the JavaScript escape form: \\u{22A4}.