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.

Roots extracted from Roots. See Colour-Making, no. 39.

algebra and arithmetick, denotes any number, which multiplied by itself once or oftener, produces any other number; and is called the square, cube, biquadrates, &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.