An alphametic, as most Word Ways readers are surely aware, is a puzzle like SEND + MORE = MONEY, in which letters are to be replaced with decimal digits to make a valid addition sum. Such puzzles were originally called "cryptarithms" and sometimes just used jumbles of letters rather than words or phrases; the term "alphametic" was introduced by J.A. H. Hunter in the 1950's for cryptarithms which use actual words.
Word Ways: Vol. 38
, Article 24.
Available at: http://digitalcommons.butler.edu/wordways/vol38/iss2/24