Mathematical Bold Fraktur Small X 𝖝

Visual Description: The glyph is a bold Fraktur form of the letter x. It reads as a compact, blackletter shape with thick strokes and angular flares. The lines feel arching yet sturdy, giving the symbol a distinctive, almost heraldic look in dense equations. It sits beside regular x in equations.

Meaning & Usage: It signals a variable or object with special emphasis in formulas. Designers use the bold Fraktur style to distinguish a symbol from plain letters, or to mark a constant in a compact lecture style. In calculators and math editors, it helps separate functions from ordinary text. This helps learners keep focus during drills.

Historical Background: The combination of bold weight with a Fraktur-inspired script emerged as typography and math fonts grew. It borrows from traditional blackletter forms and from modern digital families that map fancy alphanumeric symbols to the keyboard. The result is a stylized variable used in varied curricula. It appears in print and on screen.

Practical Use: In formulas, use the symbol to denote a special variable or a label that should stand out. In calculators and teaching apps, a quick UI control can switch font styles or reveal comparisons between x-like variables. Pair with common operators to build clear, legible expressions. This supports quick comparison checks.

See our category page for related symbols.

Look‑alikes: x (U+78).

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