Emily Dickinson Lexicon

AR'ITH-MAN-CY, n. [Gr. αριθμος, number, and μαντεια, divination.]

Divination or the foretelling of future events by the use or observation of numbers. A-RITH'ME-TIC n. [Gr. αριθμεω, to number, αριθμητικη, the art of numbering, from αριθμος, number; from ῥυθμος, number, rhythm, order, agreement.] The science of numbers, or the art of computation. The various operations of arithmetic are performed by addition, subtraction, multiplication, and division.