What 𝛏 means
𝛏 is a distinct mathematical symbol; its definition gives its meaning.
Bold Greek letters can mark vectors in physics and applied math, but conventions vary: the equation’s definitions decide what this one denotes. Unicode preserves bold and plain ξ as separate mathematical symbols because changing the style can change the variable.
Greek alphabets adopted Phoenician letter forms in the late ninth or early eighth century BCE. Xi was a later Ionian addition for the /ks/ consonant pair; Athens adopted the Ionian alphabet in 403 BCE, and it later became standard across the Greek world.
Technical math notation: bold xi separates this symbol from plain ξ.
In ordinary prose, 𝛏 is a math symbol, not typographic bold; using it for emphasis can disrupt search and restyling.
Part of the collection
Don't confuse it with
1Related characters
1
Questions people ask
1Why did 𝛏 become ξ?
Compatibility normalization such as NFKC or NFKD can fold mathematical alphabets to ordinary Greek, removing the bold distinction. If the distinction matters, avoid compatibility-normalizing the text.
More like this
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How to type or find 𝛏
- Search it as
- bold xi · math bold xi · bold greek · bold ξ · xi vector
- Shows up in
- Anything that takes text · its shape is whatever your font draws
𝛏\1D6CF\boldsymbol{\xi} with amsmath typesets bold xi; this markup does not guarantee the literal Unicode character 𝛏.𝛏 in HTML to emit this Unicode character.Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.