arithmetic Meaning, Definition & Usage

  1. noun the branch of pure mathematics dealing with the theory of numerical calculations
  2. adjective relating to or involving arithmetic
    arithmetical.
    • arithmetical computations

WordNet

A*rith"me*tic noun
Etymology
OE. arsmetike, OF. arismetique, L. arithmetica, fr. Gr. (sc. ), fr. arithmetical, fr. to number, fr. number, prob. fr. same root as E. arm, the idea of counting coming from that of fitting, attaching. See Arm. The modern Eng. and French forms are accommodated to the Greek.
Definitions
  1. The science of numbers; the art of computation by figures.
  2. A book containing the principles of this science.

Webster 1913