What 𝛙 means
It marks a distinct variable; the formula defines it.
Math notation can use letter style to distinguish quantities; this character carries mathematical meaning, not ordinary bold formatting. In physics and engineering, a vector named psi may be bold, but conventions vary.
Greek alphabetic writing is attested in 8th-century BCE inscriptions. Greeks adapted Phoenician writing and added letters for Greek sounds. Ancient local alphabets used Ψ differently: some for a breathy k sound, Ionian for p followed by s. Lowercase forms developed later through Greek handwriting; 𝛙 gives lowercase ψ mathematical bold.
Part of the collection
Don't confuse it with
2
Related characters
1
Questions people ask
1Can normalization turn 𝛙 into ψ?
Yes. Unicode NFKC and NFKD normalization map mathematical alphabets to plain Greek letters, erasing the bold distinction. Avoid these forms when that distinction carries meaning.
More like this
11
How to type or find 𝛙
- Search it as
- bold psi · mathematical psi · psi vector · Greek psi · ψ bold
- Shows up in
- Anything that takes text · its shape is whatever your font draws
𝛙\1D6D9Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.