English

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Etymology

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half-hour +‎ -ly

Adjective

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half-hourly (not comparable)

  1. Once every half-hour, every 30 minutes.
    a half-hourly train service
    • 2019 October, “Lee Valley shuttle service launched”, in Modern Railways, page 18:
      A new half-hourly service between Stratford [Greater London] and Meridian Water was introduced on 9 September by Greater Anglia.

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Translations

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Adverb

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half-hourly (not comparable)

  1. At intervals of a half-hour, every 30 minutes.
    Take this medicine half-hourly.

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