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Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

  1. n. The mathematics of integers, rational numbers, real numbers, or complex numbers under addition, subtraction, multiplication, and division.
  2. n. Archaic A book on this kind of mathematics.
  3. adj. Of or relating to arithmetic.
  4. adj. Changing according to an arithmetic progression: The increase in the food supply is arithmetic.

Century Dictionary and Cyclopedia

  1. n. The theory of numbers; the study of the divisibility of whole numbers, the remainders after division, etc. Also called theoretical or higher arithmetic.
  2. n. The art of computation: the most elementary branch of mathematics. This use of the word appears early in the sixteenth century. The art of using Arabic numerals was first called in English algorism (which see) or augrim, then practical arithmetic, lastly arithmetic simply, or elementary arithmetic. Abstract arithmetic teaches systems of notation for numbers, the three rules of direct computation, addition, subtraction, and multiplication, and various rules of indirect computation, or computation by successive approximation, such as division, extraction of the square and cube roots, double position, etc. Practical arithmetic teaches the various kinds of computation employed in trade.
  3. n. (pron. ar-ith-met′ ik). An arithmetician.
  4. n. etc. See the adjectives.
  5. A less common form of arithmetical.

Wiktionary

  1. n. The mathematics of numbers (integers, rational numbers, real numbers, or complex numbers) under the operations of addition, subtraction, multiplication, and division.
  2. adj. Of, relating to, or using arithmetic; arithmetical.
  3. adj. Of a progression, mean, etc, computed using addition rather than multiplication.

GNU Webster's 1913

  1. n. The science of numbers; the art of computation by figures.
  2. n. A book containing the principles of this science.

WordNet 3.0

  1. adj. relating to or involving arithmetic
  2. n. the branch of pure mathematics dealing with the theory of numerical calculations

Etymologies

  1. Middle English arsmetike, from Old French arismetique, from Medieval Latin arismetica, alteration of Latin arithmētica, from Greek arithmētikē (tekhnē), (art) of counting, feminine of arithmētikos, from arithmein, to count, from arithmos, number; see ar- in Indo-European roots.

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‘arithmetic’ has been looked up 1546 times, loved by 1 person, added to 9 lists, commented on 2 times, and has a Scrabble score of 17.