The Collaborative International Dictionary
Hebdomadal \Heb*dom"a*dal\, Hebdomadary \Heb*dom"a*da*ry\, a. Consisting of seven days, or occurring at intervals of seven days; weekly.
Hebdomadary \Heb*dom"a*da*ry\, n. [LL. hebdomadarius: cf. F. hebdomadier.] (R. C. Ch.) A member of a chapter or convent, whose week it is to officiate in the choir, and perform other services, which, on extraordinary occasions, are performed by the superiors.
Wiktionary
a. (context obsolete English) hebdomadal n. A member of a Roman Catholic chapter or convent whose week it is to officiate in the choir and perform other services, which, on extraordinary occasions, are performed by the superiors.
WordNet
adj. appearing or occurring every seven days; "hebdomadal (or weekly) newspapers"; "hebdomadal meetings" [syn: hebdomadal]
Usage examples of "hebdomadary".
Also on days when there is a principal or processional feast, each one of them, including the hebdomadary, is to have five eggs.
Also if there is any cloistered person who has begun his week of being hebdomadary, and falls into such sickness that he cannot celebrate the same, the cantor is to say or celebrate three masses.