What ⪡ means
Notation supplies its exact reading. Unicode lists “absolute continuity” and links ⪡ to ≪, the much-less-than sign.
In browsers and word processors, font coverage can change its shape or show a missing-glyph box if no available font contains ⪡ (as of October 2026).
Don't confuse it with
1Questions 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.
How to type ⪡
Windows (Word)
Alt+XType 2AA1, then Alt+X 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 “double nested less-than”.
Linux
Ctrl+Shift+UType 2aa1, then Enter or Space.
HTML
⪡CSS
\2AA1Windows
How to type ⪡ in Word for Windows: enter 2AA1, then press Alt+X (as of October 2026).
Linux
With Linux Unicode hex input, press Ctrl+Shift+U, enter 2AA1, then Enter (as of October 2026).
HTML
Use the HTML entity ⪡ or ⪡ (entity list checked October 2026).
Codes and encoding1 code points
HTML decimal
⪡
HTML hex
⪡
CSS content
content: "\2AA1";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%AA%A1
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.