noun the root of a plant.
2. radix ·noun a finite expression, from which a series is derived.
3. radix ·noun a primitive word, from which spring other words; a radical; a root; an etymon.
4. radix ·noun 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.