recur : Idioms & Phrases
Recurring decimal
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noun a decimal with a sequence of digits that repeats itself indefinitely
repeating decimal; circulating decimal.
WordNet
(Math.) , a circulating decimal. See underDecimal .
Webster 1913
Recurring series
(Math.) , an algebraic series in which the coefficients of the several terms can be expressed by means of certain preceding coefficients and constants in one uniform manner.