radicand. / ( ˈrædɪˌkænd, ˌrædɪˈkænd) /. noun. a number or quantity from which a root is to be extracted, usually preceded by a radical sign3 is the radicand of √3.
The radicand, in a mathematical expression, is the number found under a radical symbol. In math, a radical symbol is used to indicate that the goal of the problem is to find the