HTML Entity for Double Vertical Line Below (U+0348)

Beginner

5 min read

Updated: Sep 2026

1 example

Unicode U+0348

HTML Entity for combining double vertical line below (U+0348) tutorial illustration

Definition

What Is Double Vertical Line Below?

Double vertical line below is the Unicode character at U+0348 in the Combining Diacritical Marks block. Official name: COMBINING DOUBLE VERTICAL LINE BELOW. It is a combining mark that attaches to the previous base letter — for example a͈ → a͈.

Remember

Mark          (combining ͈)
Unicode       U+0348
Hex entity    &#x0348;
Decimal       &#840;
CSS escape    \0348
Named entity  (none)
Tip           base letter + mark

Prefer ͈ or ͈ after a base letter (no named form). Do not confuse it with spacing &Vert; (‖) or the above form U+030E.

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Named entity	None	—
Hex entity	`͈`	After a base letter in HTML (preferred)
Decimal entity	`͈`	After a base letter in HTML
Direct character	Letter + `͈`	HTML text (UTF-8)
CSS escape	`\0348`	Stylesheet `content` (after a letter)
Spacing ‖ (related)	`&Vert;` (U+2016)	Standalone double bar — not combining

When to Use Which

Situation	Use
Double vertical line below one letter	Base + `͈` — e.g. `a͈`
Single vertical line below	U+0329 — e.g. `a̩`
Double vertical line above	U+030E — e.g. `a̎`
Spacing double vertical line ‖	`&Vert;` (U+2016)
Generated text via `::before` / `::after`	`content: "a\0348"`

See it

Live Preview

Combining double vertical line below on base letters and compared with related marks.

Example a͈ o͈ u͈

Large glyph a͈

Compared a͈ a̩ a̎ ‖

With entities Hex: a͈ | Decimal: a͈

Code

Complete HTML Example

One page that shows Double Vertical Line Below with hex, decimal, CSS escape, and a typed combining form. Use View Output or open the live editor.

Hex + Decimal + CSS + Typed

Four ways to place ͈ after a base letter.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Double Vertical Line Below (U+0348) in HTML</title>
  <style>
    #point::after {
      content: "a\0348";
    }
  </style>
</head>
<body>
  <p>Built with Hex: a&#x0348;</p>
  <p>Built with Decimal: a&#840;</p>
  <p id="point">Built with CSS: </p>
  <p>Typed: a͈   o͈</p>
  <p>Order: base letter, then U+0348</p>
</body>
</html>

Try It Yourself

How It Works

1. Hex: write a base letter, then ͈ → a͈.

2. Decimal: same code point as 840 → ͈ after the letter. Same result as hex.

3. CSS: put the letter and \0348 together in content (e.g. "a\0348"). A lone combining escape has nothing to attach to.

4. Typed / order: paste the combining mark after the base letter in a UTF-8 document.

Pitfalls & Tips

Common mistakes when working with Double Vertical Line Below.

Order

Base letter first

Write the letter, then the mark: a͈. A lone ͈ has nothing to combine with.

Name

No named entity

There is no HTML5 named entity for U+0348. Use ͈ or ͈.

‖

Not &Vert;

&Vert; is the spacing double vertical line (U+2016). It does not attach below a letter like U+0348.

Not the above form

U+030E is combining double vertical line above. U+0348 sits below the letter.

CSS vs HTML

Do not mix escapes

\0348 belongs in CSS strings. ͈ / ͈ belong in HTML.

Fonts

Diacritic font coverage

Some fonts draw rare combining marks poorly. Prefer a font with solid Combining Diacritical Marks support.

Semicolon

End references

Always finish numeric entities with ; — write ͈, not &#x0348.

Compatibility

Browser Support

Combining double vertical line below (U+0348) and its entity forms (͈, ͈, CSS \\0348) are supported in all mainstream browsers. Visible glyphs depend on Combining Diacritical Marks font coverage.

✓ Universal support

Double Vertical Line Below (U+0348)

Encode with hex, decimal, CSS escape, or type the combining mark after a base letter — same code point everywhere encoding is supported.

100% Browser coverage

Google Chrome Supported

Yes

Microsoft Edge Supported

Yes

Mozilla Firefox Supported

Yes

Apple Safari Supported

Yes

Opera Supported

Yes

Internet Explorer All versions

Yes

U+0348 / entities Full support

Bottom line: Prefer ͈ after a base letter in HTML (no named form). Use ͈ when decimal form is required, and \\0348 only inside CSS content.

Remember

Key Takeaways

Unicode: combining double vertical line below is U+0348 (decimal 840).
HTML: no named entity — use a͈ / a͈.
CSS: use a letter plus \0348 inside content (e.g. "a\0348").
Meaning: combining below — not &Vert;, not U+030E, not U+0329.

One line: U+0348 → base + ͈ / ͈ / CSS \0348.

Frequently Asked Questions

How do I display combining double vertical line below (U+0348) in HTML?

Place ͈ (hex) or ͈ (decimal) after a base letter, type the combining mark in UTF-8 after a letter, or use CSS \0348 in content after a letter in the string. There is no named HTML entity for U+0348.

What is the Unicode value for this mark?

U+0348 (COMBINING DOUBLE VERTICAL LINE BELOW). Hex 0348, decimal 840. It belongs to the Combining Diacritical Marks block (U+0300–U+036F).

Is there a named HTML entity for U+0348?

No. Use numeric forms ͈ or ͈ after a base letter. The spacing double vertical line ‖ uses &Vert; (U+2016) — a different character.

When should I use U+0348?

Use it in linguistics or phonetics when a double vertical line should sit below one letter. Prefer U+0329 for a single vertical line below, U+030E for double vertical line above, and &Vert; (‖) for a spacing double bar.

What is the difference between HTML code and CSS entity for U+0348?

HTML entities (͈ or ͈) go in markup after a base letter. The CSS escape \0348 goes in stylesheet strings (usually content on ::before/::after, after a letter in the string).

Is U+0348 the same as &Vert;, U+030E, or U+0329?

No. U+0348 is combining double vertical line below. &Vert; is the spacing ‖ (U+2016). U+030E is combining double vertical line above. U+0329 is combining vertical line below (single).

Did you know?

Double vertical line below is Unicode U+0348 (decimal 840) — a combining mark (COMBINING DOUBLE VERTICAL LINE BELOW) in the Combining Diacritical Marks block. There is no HTML5 named entity; use ͈ or ͈ after a base letter (e.g. a͈ → a͈). Related: single vertical line below U+0329, double vertical line above U+030E, spacing ‖ &Vert; (U+2016).

Next: Doubled Female Sign

Learn the HTML entity for doubled female sign (U+26A2).

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About the author

Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

Experience 12 years building web and cloud systems
Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

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