Arithmetical definition |Dictionary.com

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Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This

a·rith·me·tic

[n. uh-rith-muh-tik; adj. ar-ith-met-ik] Pronunciation Key

–noun

1.	the method or process of computation with figures: the most elementary branch of mathematics.

2.	Also called higher arithmetic, theoretical arithmetic. the theory of numbers; the study of the divisibility of whole numbers, the remainders after division, etc.

3.	a book on this subject.

–adjective arithmetic

4.	Also, ar·ith·met·i·cal. of or pertaining to arithmetic.

[Origin: 1200–50; < L arithmética, fem. sing. of arithméticus < Gk arithmétik (téchné) (art, skill) of numbers, equiv. to arithmé(ein) to reckon + -t(o)- verbal adj. + -ik -ic; r. ME arsmet(r)ike < OF arismetique < ML arismética, with s for LGk th

]

—Related forms

ar·ith·met·i·cal·ly, adverb

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.

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American Heritage Dictionary - Cite This Source - Share This

a·rith·me·tic (ə-rĭth'mĭ-tĭk) Pronunciation Key
n.

The mathematics of integers, rational numbers, real numbers, or complex numbers under addition, subtraction, multiplication, and division.
Archaic A book on this kind of mathematics.

adj. ar·ith·met·ic (ār'ĭth-mět'ĭk) also ar'ith·met'i·cal (ār'ĭth-mět'ĭ-kəl)

Of or relating to arithmetic.
Changing according to an arithmetic progression: The increase in the food supply is arithmetic.

[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.]

ar'ith·met'i·cal·ly adv., a·rith'me·ti'cian (-tĭsh'ən) n.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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