One of the mysteries of the English language finally explained.
1The repeating figure or figures of a recurring decimal fraction.
- ‘What is the name for the bar over the repetend in repeating decimals?’
- ‘The length of the repetend (period) of the reciprocal can be used to determine whether the number is prime, although there are pseudoprimes.’
- 1.1formal A recurring word or phrase; a refrain.
Early 18th century: from Latin repetendum ‘something to be repeated’, neuter gerundive of repetere (see repeat).
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