the GNU version of the Collaborative International Dictionary of English
adj. Consisting of seven days, or occurring at intervals of seven days; weekly.
The Century Dictionary and Cyclopedia
Consisting of seven days, or occurring or appearing every seven days; weekly.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. of or occurring every seven days
Word Usage
"During the other six days of the week I felt a sickness of heart, which, but for the speedy approach of the hebdomadal day of liberty, I could hardly have endured."