Definitions

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

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

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

from the GNU version of the Collaborative International Dictionary of English

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

from The Century Dictionary and Cyclopedia

  • n. The theory of numbers; the study of the divisibility of whole numbers, the remainders after division, etc. Also called theoretical or higher arithmetic.
  • n. The art of computation: the most elementary branch of mathematics.
  • n. (pron. ar-ith-met′ ik). An arithmetician.
  • n. etc. See the adjectives.
  • A less common form of arithmetical.

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

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

Etymologies

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.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English arsmetike, from Old French arismetique, from Latin arithmetica, from Ancient Greek ἀριθμητική ("counting") (τέχνη ("art")), from ἀριθμός ("number"). Used in English since 13th Century. (Wiktionary)

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