**Definition:** A primitive word, from which spring other words; a radical;

a root; an etymon.

**Definition:** A number or quantity which is arbitrarily made the

fundamental number of any system; a base. Thus, 10 is the radix, or

base, of the common system of logarithms, and also of the decimal

system of numeration.

**Definition:** A finite expression, from which a series is derived.

**Definition:** The root of a plant.