Definition of cryptarithmetic in US English:

cryptarithmetic

noun

  • A branch of mathematics concerned with creating and solving cryptarithms; cryptarithms collectively.

adjective

  • Of the nature of a cryptarithm; involving or relating to cryptarithms.

Origin

1940s. From crypto- + arithmetic, after French cryptarithmique or its etymon cryptarithmie, noun.

Pronunciation

cryptarithmetic

/ˌkrɪptəˈrɪθmətɪk/