a decimal in which beyond a certain point some digit or group of digits is repeated indefinitely (Ex.: 0.47382382382...)
repeating decimal in American English
noun
Math
a decimal numeral that, after a certain point, consists of a group of one or more digits repeated ad infinitum, as 2.33333 … or 23.0218181818 …
Also called: circulating decimal, periodic decimal, recurring decimal
Word origin
[1765–75]This word is first recorded in the period 1765–75. Other words that entered Englishat around the same time include: bilateral, bonus, copperhead, mocha, pile driver