from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Biology A root or point of origin.
  • n. Mathematics The base of a system of numbers, such as 2 in the binary system and 10 in the decimal system.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A primitive word, from which other words spring.
  • n. A root
  • n. The number of distinct symbols used to represent numbers in a particular base, as 10 for decimal.

from the GNU version of the Collaborative International Dictionary of English

  • n. A primitive word, from which spring other words; a radical; a root; an etymon.
  • n.
  • n. A number or quantity which is arbitrarily made the fundamental number of any system; a base. .
  • n. A finite expression, from which a series is derived.
  • n. The root of a plant.

from The Century Dictionary and Cyclopedia

  • n. The root of a plant: used chiefly with reference to the roots of medicinal plants or preparations from them.
  • n. Hence The primary source or origin; that from which anything springs, or in which it originates.
  • n. In etymology, a. primitive word or form from which spring other words; a radical; a root.
  • n. In mathematics, a root.
  • n. In zoöl, and anatomy, a root; a rooted or rootlike part; a radicle: as, the radix or root of a tooth; the radix of a nerve.
  • n. In astrology, the original figure of birth, the source of all judgments and predictions.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. (numeration system) the positive integer that is equivalent to one in the next higher counting place


Latin rādīx, root.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin radix ("a root") (Wiktionary)


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  • STANDARD FORM A numeral in standard power-of-10 notation is written as follows: m: n  10z where the dot (.) is a period, written on the base line (not a raised dot indicating multiplication), and is called the radix point or decimal point.

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