Mathematical Bold Script Small B 𝓫

Visual Description: This glyph presents a bold, script-style lowercase b. It pairs a rounded bowl with a sweeping tail that curls toward the right. The strokes are thick and continuous, like calligraphy. In formulas and notes, it stands out for emphasis without breaking the readability of nearby symbols.

Meaning & Usage: In math writing, bold script letters signal special roles, such as variables, vectors, or named quantities. This small b is often chosen to label a dependent variable or a distinguished base. Paired with ordinary letters, it helps readers spot structure without slowing the eye.

Historical Background: Typographic variants like bold script grew from handwriting traditions translated into print and digital fonts. In math typesetting, designers added script and bold variants to distinguish roles and tone. Unicode and font families later incorporated these forms, providing a formal alternative to plain letters in equations and labels.

Practical Use: In calculators and formula editors, this bold script small b can label a variable field or a component of a vector. It helps users compare quantities quickly and keeps related terms visually grouped. UI controls let you insert the style via a palette, a shortcut, or a toggle.

See our category page for related symbols.

Look‑alikes: b (U+62).

Need styled alternatives? Try the Fancy Text tool.