1The repeating figure or figures of a recurring decimal fraction.
- ‘The length of the repetend (period) of the reciprocal can be used to determine whether the number is prime, although there are pseudoprimes.’
- ‘What is the name for the bar over the repetend in repeating decimals?’
- 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).
We take a look at several popular, though confusing, punctuation marks.