(1) [root sign]: a symbol placed before an expression, indicating that the square root of the expression is to be taken (for example, a, a+b, 2). If an indicator is added before this symbol, it means to take another corresponding root (if an indicator 3 is added, it means to take a cube root). (2) [radical]: the mathematical expression of the root. The sign of the square root (√).

Word decomposition

The root is the part of the stem of higher plants in the soil: rooting. Rootstock. Nodules. Root hair. Root carving. Fibrous roots take root. The leaves fell to the roots. The part at the bottom of an object that connects with other objects: the root. Foundation. Wall reinforcement. The origin of things: roots. Root cause. Not at all. Know the root and the bottom. No explanation. (No.) Name: country number. Year number. Font size means that a person has another nickname besides his name and personality: another name (for example, "Li Bai, whose word is too white, is a famous violet layman"). Logo: Mark. Orderly order or rank: numbers. Number. Threats: demands