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combining triple underdot

Combining Triple Underdot

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⃨ is a combining mark: put it after the symbol it belongs under. A 2000 proposal for mathematical symbols included it for building combinations and exchanging mathematical text; the base notation, not the dots alone, supplies any special meaning.

Text symbol

What ⃨ means

Put it after the symbol it belongs under.

⃨ is a combining mark with no spacing of its own, meant to attach below the preceding base symbol. In a text sequence, write the base first and ⃨ immediately after it; the notation decides whether the resulting combination has a special mathematical meaning.

Does triple underdot mean anything by itself?

No fixed reading exists without its base and notation.

The dots describe the mark's shape, not a complete meaning. Any mathematical interpretation comes from the base symbol and the notation around it.

If someone sends ⃨ alone, treat it as incomplete technical text and ask what base symbol it belongs to before assigning a reading.

Why does the triple underdot look different in different fonts?

A font can shift the dots or leave them unattached.

Check the full sequence in the target font and typesetting engine: font metrics and rendering support can shift the mark or leave it unattached. The text sequence can be correct even when its display is awkward.

Technical: it belongs in formulas, font tests, or source text, not casual conversation.

Dots alone do not carry a reading; check the base symbol and its notation.

Don't confuse it with

1

Questions people ask

1

Will fonts render this mark the same way?

No. Font metrics and the typesetting engine affect placement, so check the whole base-plus-mark sequence in the intended font.

Collections with ⃨

2

How to type or find ⃨

Search it as
triple underdot · three dots below · three dots under a symbol · combining mark · bottom accent · underdot symbol · U+20E8
Shows up in
Anything that takes text · its shape is whatever your font draws
Windows (Word)
⎇Alt+XType 20E8, then AltX to get ⃨.
Windows
⊞Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win .).
macOS
⌃Control+⌘Command+␣SpaceOpen the character viewer and search “combining triple underdot”.
Linux
⎈Ctrl+⇧Shift+UType 20e8, then Enter or Space.
HTML
⃨
CSS
\20E8
Direct Unicode
Insert U20E8 immediately after the base symbol; the mark must follow the character it attaches to.
Source code
Write \u20E8 after a base symbol in Unicode-aware source, then inspect the rendered sequence.
Unicode-math
In a Unicode-math workflow, use \threeunderdot as a bottom-accent command after the base.
Codes and encoding1 code points
HTML decimal
⃨
HTML hex
⃨
CSS content
content: "\20E8";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%83%A8
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes

A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

Families this belongs to

1

Accents & marks659 symbols