Толковый словарь английского языка - arithmetic

noun Etymology: Middle English arsmetrik, from Anglo-French arismatike, from Latin ~a, from Greek arithmētikē, from feminine of arithmētikos ~al, from arithmein to count, from arithmos number; akin to Old English rīm number, and perhaps to Greek arariskein to fit Date: 15th century 1. a branch of mathematics that deals usually with the nonnegative real numbers including sometimes the transfinite cardinals and with the application of the operations of addition, subtraction, multiplication, and division to them, a treatise on ~, computation, calculation, ~ or ~al adjective ~ally adverb ~ian noun