U+221C "∜" Fourth Root Unicode Character

U+221C "∜" Fourth Root is a mathematical symbol that represents the fourth root operation, meaning it indicates the number that, when multiplied by itself four times, yields the radicand. This symbol is part of the Mathematical Operators block in Unicode and is visually constructed by placing the radical symbol with a small numeral "4" as an index, similar to how the square root symbol (√) and cube root symbol (∛) are expressed. It is used in mathematical notation to simplify expressions involving fourth powers and is particularly common in algebra, calculus, and engineering contexts where higher-order roots are required. Unlike the square root, which is frequently rendered without an index, the fourth root explicitly includes its index to avoid ambiguity in complex equations.