What ⦅ means
It opens a mathematical enclosure.
MathML 3.0 marks it as a stretchy, symmetric fence, so a supporting renderer can enlarge it around taller content.
In Bourbaki interval notation, ⦅ pairs with ⦆ around an open interval, excluding both endpoints. In prose or code, use ordinary parentheses.
Specialist mathematical notation.
Without a stated convention, readers may not know how to read it.
Part of the collection
Don't confuse it with
2
Related characters
1
Combination ideas
1Bourbaki-style open interval; neither endpoint is included.
Questions people ask
1Why does ⦅ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
More like this
9
How to type or find ⦅
- Search it as
- white parenthesis · mathematical fence · Bourbaki interval · lopar
- Shows up in
- Anything that takes text · its shape is whatever your font draws
Windows (Word)
Windows
HTML
⦅CSS
\2985Codes and encoding1 code points
HTML decimal
⦅
HTML hex
⦅
CSS content
content: "\2985";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%A6%85
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.