Mathematical Bold Italic Small O 𝒐

Visual Description: The symbol is a small o shaped with bold, italic styling used in math fonts. It has a rounded loop, a smooth curve, and a distinct forward slant. It appears next to variables and constants in equations. The bold italic form stays readable at small sizes.

Meaning & Usage: The bold italic small o signals a variable or quantity given emphasis. It helps distinguish this symbol from regular letters in equations. It can denote a particular term or a component in a larger expression. In calculators and math editors, the style makes it easy to spot during quick comparisons and edits.

Historical Background: The bold italic family of mathematical letters arose to separate emphasis and structure in formulas. Designers created distinct shapes so bold italic symbols read clearly alongside regular letters, operators, and digits. Over time, these styles became common in textbooks, software, and digital editors, helping readers recognize notation quickly.

Practical Use: In everyday math work, the bold italic small o can mark an emphasized variable in an equation, a unit term, or a component of a vector. It helps readability when scanning formulas. Users benefit from quick UI controls that switch font weight or style, or compare items in a panel or calculator.

See our category page for related symbols.

Look‑alikes: o (U+6F).

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