hebdomadal
\ heb-DOM-uh-dl \,
adjective;
1.taking place, coming together, or published once every seven days; weekly: hebdomadal meetings; hebdomadal groups; hebdomadal journals .
noun:
1.a weekly magazine, newspaper, etc.
Quotes:
The Methodists of Octavius looked upon him as a queer fish, and through nearly a dozen years had never quite outgrown their hebdomadal tendency to surprise at seeing him enter their church.
-- Harold Frederic, "The Damnation of Theron Ware," 1896
A little solace came at tea-time, in the shape of a double ration of bread—a whole, instead of a half, slice—with the delicious addition of a thin scrape of butter: it was the hebdomadal treat to which we all looked forward from Sabbath to Sabbath.
-- Charlotte Brontë, "Jane Eyre," 1847
Origin:
Hebdomadal ultimately comes from the Greek term hébdomos meaning "seventh."
Dictionary.com