An Etymological Dictionary of Astronomy and Astrophysics

A branch of mathematics that deals usually with integers, rational numbers, real numbers, or complex numbers under addition, subtraction, multiplication, and division. See also → compute, → computation, → count, → calculate, → calculus, → mathematics, → statistics.

Etymology (EN): O.Fr. arsmetique, from M.L. arithmetica, from Gk. arithmetike (tekhne) “(art, skill) of numbers,” from arithmos “number.”

Etymology (PE): Hesâb, from Ar. hisab.