What 𝚾 means
It is a Greek chi variable; the formula defines its meaning.
Bold type can distinguish one mathematical symbol from another. In physics and engineering, bold Greek letters sometimes mark vectors—quantities with direction—but that convention does not make every bold chi a vector.
Greek alphabet inscriptions are known from about 740 BCE; early Greek writing adapted Phoenician writing and included chi among its letters. Much later, E. B. Wilson's 1901 textbook used bold type for vectors and plain type for scalars. A 1999 Unicode proposal explained that mathematical style can change a symbol's meaning, so these forms were treated as separate characters.
Should I use 𝚾 to bold ordinary text?
Use formatting for emphasis; 𝚾 stays a Greek math character.
Unicode reserves these styled letters for mathematical or technical notation. For ordinary prose, use your app's bold formatting: 𝚾 remains a Greek letter with its own text identity.
Mathematical notation; bold can distinguish this chi from other variables.
For ordinary bold emphasis, use text formatting; 𝚾 remains a Greek letter.
Part of the collection
Don't confuse it with
1
Related characters
2
Questions people ask
2Does bold chi always mean a vector?
No. Some physics and engineering notation uses bold Greek letters for vectors, but each author defines the symbols in the formula.
Can text normalization turn 𝚾 into plain Χ?
Yes. Compatibility normalization such as NFKC or NFKD maps mathematical alphanumeric characters to their base Greek or Latin letters, removing the bold distinction.
More like this
10
How to type or find 𝚾
- Search it as
- bold chi · math chi · chi symbol · greek chi · chi variable · bold x · capital x · diagonal cross · multiplication sign · cross mark
- Shows up in
- Anything that takes text · its shape is whatever your font draws
𝚾\1D6BE\bfChi and press Tab to complete it.Why is 𝚾 a box on my screen?
fsymbols draws rare signs with its own fonts, so they show here even where your device has none. An app or website without such a font shows an empty box (□) or a question mark instead. Turn our fonts off to see each sign as your device draws it by itself: a box here means a box in your chats and documents too.
Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.