radix (ˈreɪdɪks)  
—n , pl dices, dixes  
1.  maths any number that is the base of a number system or of a system of logarithms: 10 is the radix of the decimal system 
2.  biology the root or point of origin of a part or organ 
3.  linguistics a less common word for root 
[C16: from Latin rādīx root; compare Greek rhadix small branch, rhiza root] 
radix ra·dix (rā'dĭks)
n. pl. ra·dix·es or rad·i·ces (rād'ĭsēz', rā'dĭ)
The primary or beginning portion of a part or organ, as of a nerve at its origin from the brainstem or spinal cord.
radix (rā'dĭks) Pronunciation Key
Plural radices (rād'ĭsēz', rā'dĭ) or radixes

radix
in mathematics, an arbitrarily chosen whole number greater than 1 in terms of which any number can be expressed as a sum of that base raised to various powers. See numerals and numeral systems.
Learn more about radix with a free trial on Britannica.com.