Webster's 1828 Dictionary
HEBDOMADARY
n.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.
Webster's 1913 Dictionary
HEBDOMADARY
Heb *dom "a *da *ry, n. Etym: [LL. hebdomadarius: cf. F. hebdomadier.](R. C. Ch. )
Defn: 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.
The Wordsmith Dictionary