Mathematical Bold Script Small D 𝓭

Visual Description: The character is a small letter d written in a bold script. It features smooth, rounded loops and a slightly tall, slanted stem. Thick strokes give it a strong presence, especially on calculators and input panels where math symbols appear with clear distinction.

Meaning & Usage: In math notation, this bold script d often marks differential forms or special variables. It signals differentiation with emphasis and helps separate it from ordinary letters. In UI contexts it aids quick recognition when users build equations or compare derivative values.

Historical Background: The style grows from a family of decorative scripts used to clarify complex math notation. It is not tied to a single era or place, but to a trend of using bold script letters to differentiate special variables. In classrooms and software, this shape signals emphasis without altering core fonts.

Practical Use: In calculators and quick UI tools, this symbol can be toggled or inserted via a dedicated button or palette. It helps users distinguish differential operations and unique variables at a glance. When constructing proofs or comparing results, the bold script d speeds recognition and reduces input errors.

See our category page for related symbols.

Look‑alikes: d (U+64).

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