/ Dictionary / Index R radix: Meaning and Definition of Find definitions for: ra•dix Pronunciation: (rā'diks), [key] — pl. rad•i•ces ra•dix•es. a number taken as the base of a system of numbers, logarithms, or the like. a root; radicle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: radix (Thesaurus) radius vector rad-lib Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language