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Webster 1913 Edition

Radix

Ra′dix

(rā′dĭks)
,
Noun.
;
pl. L.
Radices
(răd′ĭ-sēz)
, E.
Radixes
(rā′dĭks-ĕz)
.
[L.
radix
,
-icis
, root. See
Radish
.]
1.
(Philol.)
A primitive word, 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 1828 Edition

Radix

RA'DIX

,
Noun.
[L. a root.]
1.
In etymology, a primitive word from which spring other words.
2.
In logarithms, the base of any system of logarithms, or that number whose logarithm is unity. Thus in Briggs', or the common system of logarithms, the radix is 10; in Napier's, it is 2.7182818284. All other numbers are considered as some powers or roots of the radix, the exponents of which powers or roots, constitute the logarithms of those numbers respectively.
3.
In algebra, radix sometimes denotes the root of a finite expression, from which a series is derived.

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