1. The mathematics of integers, rational numbers, real numbers, or complex numbers under addition, subtraction, multiplication, and division. 2.Archaic A book on this kind of mathematics.
ADJECTIVE:
ar·ith·met·ic (rth-mtk) also arith·meti·cal (rth-mt-kl) 1. Of or relating to arithmetic. 2. Changing according to an arithmetic progression: The increase in the food supply is arithmetic.
ETYMOLOGY:
Middle English arsmetike, from Old French arismetique, from Medieval Latin arismetica, alteration of Latin arithmtica, from Greek arithmtik (tekhn), (art) of counting, feminine of arithmtikos, from arithmein, to count, from arithmos, number. See ar- in Appendix I.
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tica, from Greek arithm
