Square root of a number

(Math.) that number or quantity which, multiplied by itself, produces the given number or quantity.

See also: Square

References in periodicals archive ?
For example, assume we want to find square root of a number N (not necessarily an integer).
Then if we succeed in grasping that "getting the square root of a number" is some kind of "reverse-square", why cannot we "reverse-triangle," or "reverse sphere," for example?