Meaning of ARITHMETIC in English

ARITHMETIC

n. & adj.

--n.

1. a the science of numbers. b one's knowledge of this (have improved my arithmetic).

2 the use of numbers; computation (a problem involving arithmetic).

--adj. (also arithmetical) of or concerning arithmetic.

Phrases and idioms:

arithmetic mean the central number in an arithmetic progression. arithmetic progression

1. an increase or decrease by a constant quantity (e.g. 1, 2, 3, 4, etc., 9, 7, 5, 3, etc.).

2 a sequence of numbers showing this.

Derivatives:

arithmetician n.

Etymology: ME f. OF arismetique f. L arithmetica f. Gk arithmetike (tekhne) art of counting f. arithmos number

Oxford English vocab.      Оксфордский английский словарь.