What 𝛕 means
No fixed value; the equation supplies its meaning.
In physics and applied math, bold lowercase letters often denote vectors. Greek tau descends from Phoenician taw, a consonant letter for /t/ whose older forms included both X and cross shapes. The bold math alphabet lets plain text preserve differences between variables.
Part of the collection
Don't confuse it with
1
Related characters
1
Questions people ask
1Why does 𝛕 become τ?
NFKC compatibility normalization maps mathematical alphanumeric letters to their base Greek letters, removing the bold distinction. That can change an equation's meaning.
More like this
11
How to type or find 𝛕
- Search it as
- tau · bold tau · greek tau · vector tau
- Shows up in
- Anything that takes text · its shape is whatever your font draws
Windows (Word)
Windows
HTML
𝛕CSS
\1D6D5LaTeX
How to type bold tau: in LaTeX math, load the
bm package and use \bm{\tau}.Codes and encoding1 code points
HTML decimal
𝛕
HTML hex
𝛕
CSS content
content: "\1D6D5";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%F0%9D%9B%95
1
On screen
1
Code points
2
JS .length
4
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.