I. hebˈdäməˌderē noun
( -es )
Etymology: Middle English ebdomadary, from Late Latin hebdomadarius, from Latin hebdomad-, hebdomas + -arius -ary (n. suffix)
: a member of a Roman Catholic chapter or convent appointed for the week to sing the chapter mass and lead the recitation of the canonical hours
II. adjective
Etymology: Medieval Latin hebdomadarius, from Latin hebdomad-, hebdomas + -arius -ary (adjective suffix)
: occurring every seven days