Definition of hebdomadal in English:

hebdomadal

adjective

formal
  • Weekly (used especially of organizations which meet weekly):

    ‘Oxford University's Hebdomadal Council’
    • ‘Though I doubt we have sufficient data to produce statistically significant results by this method, other epigraphic evidence also points to the spread of the hebdomadal week in the first century.’
    • ‘That hebdomadal structure, dividing into four the 28 days of the lunar calendar and allocating one day to be special, is an ancient thing, probably pre-dating the Hebrews, probably going back to the Sumerians.’
    • ‘The hebdomadal letter does not always represent the same weekday every year.’
    • ‘Incidentally, when looking to see whether I really meant gerund, I encountered ‘hebdomadal’ - occurring every seven days.’
    once a week, seven-day
    View synonyms

Origin

Early 17th century (in the sense ‘lasting seven days’): from late Latin hebdomadalis, from Greek hebdomas, hebdomad- the number seven, seven days, from hepta seven.

Pronunciation:

hebdomadal

/hɛbˈdɒməd(ə)l/