Radix

n.	1.	(Philol.) A primitive word, from which spring other words; a radical; a root; an etymon.
	2.	(Math.) 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.
	3.	(Bot.) The root of a plant.

Noun

1.

radix - (numeration system) the positive integer that is equivalent to one in the next higher counting place; "10 is the radix of the decimal system" Synonyms: base

(mathematics)

radix - (Or "base", "number base") In a positional representation of numbers, that integer by which the significance of one digit place must be multiplied to give the significance of the next higher digit place. Conventional decimal numbers are radix ten, binary numbers are radix two.

beginning, bulb, bulbil, commencement, conception, corm, derivation, genesis, grass roots, head, inception, origin, original, origination, provenience, radical, radicle, rhizome, rise, root, rootstock, source, stem, stock, tap, taproot, tuber, tubercle