HEBDOM'ADAL HEBDOM'ADARY, adjective Weekly; consisting of seven days, or occurring every seven days. HEBDOM'ADARY, noun A member of a chapter or convent, whose week it is to officiate in the choir, rehearse the anthems and prayers, and perform other services, which on extraordinary occasions are performed by the superiors.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI