U+25BD "▽" White down-Pointing Triangle Unicode Character

U+25BD "▽" White down-Pointing Triangle is a geometric symbol that represents an outlined downward-pointing triangle, often used in user interfaces, mathematical notation, and diagrams to indicate reduction, collapse, or a downward direction. It belongs to the Geometric Shapes block in Unicode and is frequently employed as a toggle control for expanding or collapsing sections of content, such as in tree views or dropdown menus. Its hollow appearance distinguishes it from filled variants, allowing for versatile use in contexts where a less heavy or open form is desired, including in weather maps, flowcharts, or as a decorative element in typography.