Mathematical Bold Script Small O 𝓸

Visual Description: The symbol is a stylized small o written in bold script. Its curves form a smooth loop with a light slant. The lines are thick at the main stroke and taper at the end. It looks distinct from ordinary letters, yet remains readable in math text.

Meaning & Usage: It signals a variable or object chosen for emphasis. The bold script cues distinction from plain letters. It can denote a particular function or element in a formula. Writers use it to mark special roles in proofs, models, or algorithm sketches. It helps readers track changes over steps.

Historical Background: The bold script style belongs to a family of decorative mathematical alphabets. It arose with digital fonts that offered alternate letterforms for emphasis. In printed and electronic texts, such symbols helped readers distinguish objects, operators, and named constructs. The history is general, not tied to any single place.

Practical Use: In formulas, the glyph can stand in for a special object while nearby variables describe relationships. Calculators and math editors may let you insert it to clarify notation. Quick UI controls can insert this form, switch contexts, or compare quantities without rewriting long expressions.

See our category page for related symbols.

Look‑alikes: o (U+6F).

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