1. The science of numbers; the art of computation by figures.
2. A book containing the principles of this science. Arithmetic of sines, trigonometry. — Political arithmetic, the application of the science of numbers to problems in civil government, political economy, and social science. — Universal arithmetic, the name given by Sir Isaac Newton to algebra.
ARITHMETICAL
Ar`ith*met"ic*al, a.
Defn: Of or pertaining to arithmetic; according to the rules or
method of arithmetic. Arithmetical complement of a logarithm. See
Logarithm.
— Arithmetical mean. See Mean.
— Arithmetical progression. See Progression.
— Arithmetical proportion. See Proportion.
ARITHMETICALLY
Ar`ith*met"ic*al*ly, adv.
Defn: Conformably to the principles or methods of arithmetic.
ARITHMETICIAN
A*rith`me*ti"cian, n. Etym: [Cf. F. arithméticien.]
Defn: One skilled in arithmetic.
ARITHMOMANCY
A*rith"mo*man"cy, n.
Defn: Arithmancy.