Mathematical Sans-Serif Bold Small D 𝗱

Visual Description: The character appears as a small, bold d in a geometric, clean sans serif. The stroke is even, with tight counters and a compact footprint. It reads clearly at small sizes and stands out in math lines, where it often represents a variable or a differential in equations.

Meaning & Usage: In formulas it acts as a symbol for a differential or a simple variable. In calculus, dy and dx show changes, while the bold d can mark a distinct, visually strong quantity. In calculators and editors, quick UI controls insert it to compare small changes or increments.

Historical Background: The symbol emerged with broader mathematical notation as fonts diversified for digital screens. Bold sans serif variants were adopted to improve legibility in compact layouts. The d became a versatile mark in both theory and application, evolving as we design representations that function well across fonts and interfaces.

Practical Use: Use the symbol to label a differential in notes and formulas. In UI contexts, provide a dedicated button for d to speed up input, or a quick compare mechanism that highlights small deltas. It helps keep equations readable when several symbols rely on vertical space.

See our category page for related symbols.

Look‑alikes: d (U+64).

Need styled alternatives? Try the Fancy Text tool.