What ⤊ means
It marks an upward relation in technical notation.
A 1999 Unicode proposal grouped the triple up arrow with relation signs, including mathematical arrows and harpoons—arrow-like marks with a barb on one end.
Why does ⤊ look different in different fonts?
Unicode does not prescribe one exact drawing.
Arrowhead spacing and shaft proportions vary by font; MathML may stretch it to fit an equation.
Technical notation; read its relation from the surrounding formula.
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 290A, 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 “upwards triple arrow”.
Linux
Ctrl+Shift+UType 290a, then Enter or Space.
HTML
⤊CSS
\290ACodes and encoding1 code points
HTML decimal
⤊
HTML hex
⤊
CSS content
content: "\290A";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%A4%8A
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.