HTML Entity for Left Right Wave Arrow (↭)
What You'll Learn
How to display the Left Right Wave Arrow (↭) in HTML using the named entity, hexadecimal, decimal, and CSS escape methods. This symbol is U+21AD (LEFT RIGHT WAVE ARROW) in the Arrows block (U+2190–U+21FF)—a bidirectional arrow with a wavy line, often used for reversible relations, oscillating or alternating flow, or “leads to and from” in chemistry and logic.
Render it with ↭ (named), ↭, ↭, or CSS \21AD. Do not confuse ↭ with U+2194 (↔, straight left right arrow / ↔) or U+21D4 (⇔, double arrow / ⇔).
⚡ Quick Reference — Left Right Wave Arrow
U+21ADArrows block
↭Hexadecimal reference
↭Decimal reference
↭Most readable option
Name Value
──────────── ──────────
Unicode U+21AD
Hex code ↭
HTML code ↭
Named entity ↭
CSS code \21AD
Meaning Left right wave arrow (reversible)
Related U+2194 = left right arrow (↔)
U+21D4 = left right double arrow (⇔)Complete HTML Example
A simple example showing the Left Right Wave Arrow (↭) using the named entity, hexadecimal code, decimal HTML code, and a CSS content escape:
<!DOCTYPE html>
<html>
<head>
<style>
#point:after{
content: "\21AD";
}
</style>
</head>
<body>
<p>Arrow (hex): ↭</p>
<p>Arrow (decimal): ↭</p>
<p>Arrow (named): ↭</p>
<p id="point">Arrow (CSS): </p>
</body>
</html>🌐 Browser Support
The Left Right Wave Arrow (↭) is universally supported in all modern browsers when the font includes Arrows block glyphs:
👀 Live Preview
See the Left Right Wave Arrow (↭) rendered live in different contexts:
🧠 How It Works
Hexadecimal Code
↭ uses the Unicode hexadecimal value 21AD for the left right wave arrow. The x prefix indicates hexadecimal format.
Decimal HTML Code
↭ uses the decimal Unicode value 8621 to display the same character.
Named Entity
↭ is the semantic named entity — the easiest to read in source HTML and the most self-descriptive option.
CSS Entity
\21AD is used in CSS stylesheets in the content property of pseudo-elements like ::after.
Same visual result
All four methods produce ↭. Unicode U+21AD is in the Arrows block. Previous: Left Right Open Headed Arrow.
Use Cases
The Left Right Wave Arrow (↭) is commonly used in:
In chemistry, indicate equilibrium or reversible reactions (e.g. A ↭ B).
Denote reversible or symmetric relations in logic and proofs.
Show oscillating or alternating flow between states or nodes.
Indicate two-way sync, reversible mapping, or bidirectional relation with wavy path.
Use in papers for reversible or oscillating process notation.
Display “reversible” or “sync both ways” in interfaces and icon sets.
💡 Best Practices
Do
- Use
↭for readable source markup - Add
aria-labelor surrounding text for accessibility - Verify your font supports the Arrows block (U+21AD)
- Keep one entity style per project for consistency
- Provide context when the symbol denotes reversible or oscillating relation
Don’t
- Confuse ↭ (wavy) with ↔ (straight left right arrow)
- Use CSS
\21ADinside HTML text nodes - Assume all fonts render the wavy arrow identically
- Mix entity styles randomly in one file
- Use the symbol without explaining its reversible meaning on first use
Key Takeaways
Three HTML references plus CSS all render ↭
↭ ↭ ↭For CSS, use \21AD in the content property
Unicode U+21AD — LEFT RIGHT WAVE ARROW
Prefer ↭ for readability—it’s the named HTML entity
Previous: Left Right Open Headed Arrow Next: Left Semidirect Product
❓ Frequently Asked Questions
↭ (hex), ↭ (decimal), ↭ (named), or \21AD in CSS content. All four methods render ↭ correctly.U+21AD (LEFT RIGHT WAVE ARROW). Arrows block (U+2190–U+21FF). Hex 21AD, decimal 8621. Shows a bidirectional arrow with a wavy line.↭, ↭, or ↭) go in markup. The CSS escape \21AD is used in stylesheets, typically on ::before or ::after. Both produce ↭.↭ is the named HTML entity for U+21AD. You can also use ↭ (decimal) or ↭ (hex) and \21AD in CSS.Explore More HTML Entities!
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