See also: semi-hourly

English edit

Alternative forms edit

Etymology edit

semi- +‎ hourly

Adjective edit

semihourly (not comparable)

  1. (properly) Half-hourly: occurring every thirty minutes.
    The warship rang its semihourly bell, announcing it was now half past 10 o'clock.
  2. (inexact) Roughly (but not exactly) hourly: occurring around every sixty minutes.

Adverb edit

semihourly (not comparable)

  1. (properly) Half-hourly: at intervals of 30 minutes.
    Samples were collected semihourly (on the hour and half hour) throughout the study.
  2. (inexact) Roughly (but not exactly) hourly: at intervals of around 60 minutes.