arithmancy|ˈærɪθˌmænsɪ|[contracted for arithmomancy, but earlier.]Divination by numbers.1577HolinshedDescr.Brit.ix. 28/2An old kind of arithmancie, fathered on Pythagoras, yet never invented by him.1878J. GrayChina II. xvii. 25Other systems of telling fortunes are in vogue, as for instance..arithmancy.