Radical sign Meaning, Definition & Usage

Definitions

1. (Math.), the sign &root; (originally the letter r, the initial of radix, root), placed before any quantity, denoting that its root is to be extracted; thus, &root;a, or &root;(a + b). To indicate any other than the square root, a corresponding figure is placed over the sign; thus ∛a, indicates the third or cube root of a.