semihourly.
Half-hourly: occurring every thirty minutes.
Meaning & usage
Half-hourly: occurring every thirty minutes.
The warship rang its semihourly bell, announcing it was now half past 10 o'clock.
Roughly (but not exactly) hourly: occurring around every sixty minutes.
Where this word comes from
From semi- + hourly.
Half-hourly: at intervals of 30 minutes.
Samples were collected semihourly (on the hour and half hour) throughout the study.
Roughly (but not exactly) hourly: at intervals of around 60 minutes.
Where this word comes from
From semi- + hourly.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.