among botanists, denotes that part of a plant which imbibes the nutritious juices of the earth, and transmits them to the other parts. See Plant and Radix.

Colours extracted from Roots. See Colour-Making, n°41. Root, in algebra and arithmetic, denotes any number which, multiplied by itself once or oftener, produces any other number; and is called the square, cube, biquadrate, &c. root, according to number of multiplications. Thus, \(2\) is the square-root of \(4\); the cube-root of \(8\); the biquadrate-root of \(16\), &c.