Ra"dix (?), n.; pl. Radices (#), E. Radixes (#). [L. radix, -icis, root. See Radish.]
1. Philol.
A primitive, from which spring other words; a radical; a root; an etymon.
2. Math. (a)
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.
(b) Alg.
A finite expression, from which a series is derived.
[R.]
Hutton.
3. Bot.
The root of a plant.
© Webster 1913.