What 𝞍 means
No single quantity is built into the glyph.
A vector phi may be bold in physics or engineering conventions that mark vectors. There, 𝞍 can denote a vector; the equation identifies which one.
The STIX (Scientific and Technical Information Exchange) project gathered needed mathematical glyphs for technical publishing. Unicode accepted its mathematical-alphabet proposal in 1999, letting formulas preserve style in text as well as page layout.
Don't confuse it with
4𝞅
Mathematical Sans-Serif Bold Small Phi
Both are bold sans-serif phi forms: 𝞅 styles ordinary small phi φ; 𝞍 styles the separate phi-symbol form ϕ.
Empty Set
∅ is the empty-set sign, a circle with a slash. 𝞍 is a bold Greek phi used as a variable. The two are often swapped.
Diameter Sign
⌀ is the diameter sign on technical drawings. 𝞍 is a bold sans-serif Greek phi.
Latin Capital Letter O With Stroke
Ø is a Danish and Norwegian letter, an O with a slanted slash. 𝞍's stroke runs upright through the bowl.
Related characters
3ϕ
Greek Phi Symbol
The Greek phi-symbol form that 𝞍 restyles in bold sans-serif mathematical notation.
Greek Small Letter Phi
The ordinary Greek small phi. ϕ is its separately encoded variant, which 𝞍 sets in bold sans-serif.
Greek Capital Letter Phi
The Greek capital phi, the uppercase counterpart of phi.
Combination ideas
3The golden ratio, about 1.618.
Power factor: cosine of the phase angle.
A quarter-cycle phase shift between two waves.
Questions people ask
1Can normalization change 𝞍?
Yes. NFKC, a compatibility text-cleanup form, changes 𝞍 to plain φ, dropping its bold style and distinct phi-symbol form.
More like this
13
How to type or find 𝞍
- Search it as
- vector phi
- Shows up in
- Anything that takes text · its shape is whatever your font draws
Windows (Word)
Windows
macOS
HTML
𝞍CSS
\1D78DCodes and encoding1 code points
HTML decimal
𝞍
HTML hex
𝞍
CSS content
content: "\1D78D";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%F0%9D%9E%8D
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.