U+25B4 "▴" Black Up-Pointing Small Triangle Unicode Character

U+25B4 "▴" Black Up-Pointing Small Triangle is a geometric symbol representing a compact, upward-pointing arrowhead or triangle, typically filled in solid black. It belongs to the Geometric Shapes block in Unicode and is commonly used in digital interfaces as a visual indicator for expandable menus, collapsible sections, or to denote an increase, ascension, or upward direction in user interfaces and diagrams. Unlike larger or hollow variations, this small triangle is concise and often appears in contexts where space is limited, such as button labels, list toggles, or mathematical notation for gradients and operators.