semihourly
advEtymology From semi- + hourly.
1
Half-hourly: at intervals of 30 minutes.
- Samples were collected semihourly (on the hour and half hour) throughout the study.
2
Roughly (but not exactly) hourly: at intervals of around 60 minutes.
semihourly
adjEtymology From semi- + hourly.
1
Half-hourly: occurring every thirty minutes.
- The warship rang its semihourly bell, announcing it was now half past 10 o'clock.
2
Roughly (but not exactly) hourly: occurring around every sixty minutes.